diff --git a/Android.bp b/Android.bp
index 86e5747..5ec791a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -451,6 +451,17 @@
         "telecomm/java/com/android/internal/telecom/IInCallService.aidl",
         "telecomm/java/com/android/internal/telecom/ITelecomService.aidl",
         "telecomm/java/com/android/internal/telecom/RemoteServiceCallback.aidl",
+        "telephony/java/android/telephony/ims/internal/aidl/IImsCallSessionListener.aidl",
+        "telephony/java/android/telephony/ims/internal/aidl/IImsCapabilityCallback.aidl",
+        "telephony/java/android/telephony/ims/internal/aidl/IImsConfig.aidl",
+        "telephony/java/android/telephony/ims/internal/aidl/IImsConfigCallback.aidl",
+        "telephony/java/android/telephony/ims/internal/aidl/IImsMmTelFeature.aidl",
+        "telephony/java/android/telephony/ims/internal/aidl/IImsMmTelListener.aidl",
+        "telephony/java/android/telephony/ims/internal/aidl/IImsRcsFeature.aidl",
+        "telephony/java/android/telephony/ims/internal/aidl/IImsRegistration.aidl",
+        "telephony/java/android/telephony/ims/internal/aidl/IImsRegistrationCallback.aidl",
+        "telephony/java/android/telephony/ims/internal/aidl/IImsServiceController.aidl",
+        "telephony/java/android/telephony/ims/internal/aidl/IImsServiceControllerListener.aidl",
         "telephony/java/android/telephony/mbms/IMbmsDownloadSessionCallback.aidl",
         "telephony/java/android/telephony/mbms/IMbmsStreamingSessionCallback.aidl",
         "telephony/java/android/telephony/mbms/IDownloadStateCallback.aidl",
diff --git a/telephony/java/android/telephony/ims/internal/ImsCallSessionListener.java b/telephony/java/android/telephony/ims/internal/ImsCallSessionListener.java
new file mode 100644
index 0000000..5d16dd5
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/ImsCallSessionListener.java
@@ -0,0 +1,364 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package android.telephony.ims.internal;
+
+import android.os.RemoteException;
+import android.telephony.ims.internal.aidl.IImsCallSessionListener;
+
+import com.android.ims.ImsCallProfile;
+import com.android.ims.ImsConferenceState;
+import com.android.ims.ImsReasonInfo;
+import com.android.ims.ImsStreamMediaProfile;
+import com.android.ims.ImsSuppServiceNotification;
+import com.android.ims.internal.ImsCallSession;
+
+/**
+ * Proxy class for interfacing with the framework's Call session for an ongoing IMS call.
+ *
+ * DO NOT remove or change the existing APIs, only add new ones to this Base implementation or you
+ * will break other implementations of ImsCallSessionListener maintained by other ImsServices.
+ *
+ * @hide
+ */
+public class ImsCallSessionListener {
+
+    private final IImsCallSessionListener mListener;
+
+    public ImsCallSessionListener(IImsCallSessionListener l) {
+        mListener = l;
+    }
+
+    /**
+     * Called when a request is sent out to initiate a new session
+     * and 1xx response is received from the network.
+     */
+    public void callSessionProgressing(ImsStreamMediaProfile profile)
+            throws RemoteException {
+        mListener.callSessionProgressing(profile);
+    }
+
+    /**
+     * Called when the session is initiated.
+     *
+     * @param profile the associated {@link ImsCallSession}.
+     */
+    public void callSessionInitiated(ImsCallProfile profile) throws RemoteException {
+        mListener.callSessionInitiated(profile);
+    }
+
+    /**
+     * Called when the session establishment has failed.
+     *
+     * @param reasonInfo detailed reason of the session establishment failure
+     */
+    public void callSessionInitiatedFailed(ImsReasonInfo reasonInfo) throws RemoteException {
+        mListener.callSessionInitiatedFailed(reasonInfo);
+    }
+
+    /**
+     * Called when the session is terminated.
+     *
+     * @param reasonInfo detailed reason of the session termination
+     */
+    public void callSessionTerminated(ImsReasonInfo reasonInfo) throws RemoteException {
+        mListener.callSessionTerminated(reasonInfo);
+    }
+
+    /**
+     * Called when the session is on hold.
+     */
+    public void callSessionHeld(ImsCallProfile profile) throws RemoteException {
+        mListener.callSessionHeld(profile);
+    }
+
+    /**
+     * Called when the session hold has failed.
+     *
+     * @param reasonInfo detailed reason of the session hold failure
+     */
+    public void callSessionHoldFailed(ImsReasonInfo reasonInfo) throws RemoteException {
+        mListener.callSessionHoldFailed(reasonInfo);
+    }
+
+    /**
+     * Called when the session hold is received from the remote user.
+     */
+    public void callSessionHoldReceived(ImsCallProfile profile) throws RemoteException {
+        mListener.callSessionHoldReceived(profile);
+    }
+
+    /**
+     * Called when the session resume is done.
+     */
+    public void callSessionResumed(ImsCallProfile profile) throws RemoteException {
+        mListener.callSessionResumed(profile);
+    }
+
+    /**
+     * Called when the session resume has failed.
+     *
+     * @param reasonInfo detailed reason of the session resume failure
+     */
+    public void callSessionResumeFailed(ImsReasonInfo reasonInfo) throws RemoteException {
+        mListener.callSessionResumeFailed(reasonInfo);
+    }
+
+    /**
+     * Called when the session resume is received from the remote user.
+     */
+    public void callSessionResumeReceived(ImsCallProfile profile) throws RemoteException {
+        mListener.callSessionResumeReceived(profile);
+    }
+
+    /**
+     * Called when the session merge has been started.  At this point, the {@code newSession}
+     * represents the session which has been initiated to the IMS conference server for the
+     * new merged conference.
+     *
+     * @param newSession the session object that is merged with an active & hold session
+     */
+    public void callSessionMergeStarted(ImsCallSession newSession, ImsCallProfile profile)
+            throws RemoteException {
+        mListener.callSessionMergeStarted(newSession != null ? newSession.getSession() : null,
+                profile);
+    }
+
+    /**
+     * Called when the session merge is successful and the merged session is active.
+     *
+     * @param newSession the new session object that is used for the conference
+     */
+    public void callSessionMergeComplete(ImsCallSession newSession) throws RemoteException {
+        mListener.callSessionMergeComplete(newSession != null ? newSession.getSession() : null);
+    }
+
+    /**
+     * Called when the session merge has failed.
+     *
+     * @param reasonInfo detailed reason of the call merge failure
+     */
+    public void callSessionMergeFailed(ImsReasonInfo reasonInfo) throws RemoteException {
+        mListener.callSessionMergeFailed(reasonInfo);
+    }
+
+    /**
+     * Called when the session is updated (except for hold/unhold).
+     */
+    public void callSessionUpdated(ImsCallProfile profile) throws RemoteException {
+        mListener.callSessionUpdated(profile);
+    }
+
+    /**
+     * Called when the session update has failed.
+     *
+     * @param reasonInfo detailed reason of the session update failure
+     */
+    public void callSessionUpdateFailed(ImsReasonInfo reasonInfo) throws RemoteException {
+        mListener.callSessionUpdateFailed(reasonInfo);
+    }
+
+    /**
+     * Called when the session update is received from the remote user.
+     */
+    public void callSessionUpdateReceived(ImsCallProfile profile) throws RemoteException {
+        mListener.callSessionUpdateReceived(profile);
+    }
+
+    /**
+     * Called when the session has been extended to a conference session.
+     *
+     * @param newSession the session object that is extended to the conference
+     *      from the active session
+     */
+    public void callSessionConferenceExtended(ImsCallSession newSession, ImsCallProfile profile)
+            throws RemoteException {
+        mListener.callSessionConferenceExtended(newSession != null ? newSession.getSession() : null,
+                profile);
+    }
+
+    /**
+     * Called when the conference extension has failed.
+     *
+     * @param reasonInfo detailed reason of the conference extension failure
+     */
+    public void callSessionConferenceExtendFailed(ImsReasonInfo reasonInfo) throws RemoteException {
+        mListener.callSessionConferenceExtendFailed(reasonInfo);
+    }
+
+    /**
+     * Called when the conference extension is received from the remote user.
+     */
+    public void callSessionConferenceExtendReceived(ImsCallSession newSession,
+            ImsCallProfile profile) throws RemoteException {
+        mListener.callSessionConferenceExtendReceived(newSession != null
+                ? newSession.getSession() : null, profile);
+    }
+
+    /**
+     * Called when the invitation request of the participants is delivered to the conference
+     * server.
+     */
+    public void callSessionInviteParticipantsRequestDelivered() throws RemoteException {
+        mListener.callSessionInviteParticipantsRequestDelivered();
+    }
+
+    /**
+     * Called when the invitation request of the participants has failed.
+     *
+     * @param reasonInfo detailed reason of the conference invitation failure
+     */
+    public void callSessionInviteParticipantsRequestFailed(ImsReasonInfo reasonInfo)
+            throws RemoteException {
+        mListener.callSessionInviteParticipantsRequestFailed(reasonInfo);
+    }
+
+    /**
+     * Called when the removal request of the participants is delivered to the conference
+     * server.
+     */
+    public void callSessionRemoveParticipantsRequestDelivered() throws RemoteException {
+        mListener.callSessionRemoveParticipantsRequestDelivered();
+    }
+
+    /**
+     * Called when the removal request of the participants has failed.
+     *
+     * @param reasonInfo detailed reason of the conference removal failure
+     */
+    public void callSessionRemoveParticipantsRequestFailed(ImsReasonInfo reasonInfo)
+            throws RemoteException {
+        mListener.callSessionInviteParticipantsRequestFailed(reasonInfo);
+    }
+
+    /**
+     * Notifies the framework of the updated Call session conference state.
+     *
+     * @param state the new {@link ImsConferenceState} associated with the conference.
+     */
+    public void callSessionConferenceStateUpdated(ImsConferenceState state) throws RemoteException {
+        mListener.callSessionConferenceStateUpdated(state);
+    }
+
+    /**
+     * Notifies the incoming USSD message.
+     */
+    public void callSessionUssdMessageReceived(int mode, String ussdMessage)
+            throws RemoteException {
+        mListener.callSessionUssdMessageReceived(mode, ussdMessage);
+    }
+
+    /**
+     * Notifies of a case where a {@link com.android.ims.internal.ImsCallSession} may potentially
+     * handover from one radio technology to another.
+     *
+     * @param srcAccessTech    The source radio access technology; one of the access technology
+     *                         constants defined in {@link android.telephony.ServiceState}.  For
+     *                         example
+     *                         {@link android.telephony.ServiceState#RIL_RADIO_TECHNOLOGY_LTE}.
+     * @param targetAccessTech The target radio access technology; one of the access technology
+     *                         constants defined in {@link android.telephony.ServiceState}.  For
+     *                         example
+     *                         {@link android.telephony.ServiceState#RIL_RADIO_TECHNOLOGY_LTE}.
+     */
+    public void callSessionMayHandover(int srcAccessTech, int targetAccessTech)
+            throws RemoteException {
+        mListener.callSessionMayHandover(srcAccessTech, targetAccessTech);
+    }
+
+    /**
+     * Called when session access technology changes.
+     *
+     * @param srcAccessTech original access technology
+     * @param targetAccessTech new access technology
+     * @param reasonInfo
+     */
+    public void callSessionHandover(int srcAccessTech, int targetAccessTech,
+            ImsReasonInfo reasonInfo) throws RemoteException {
+        mListener.callSessionHandover(srcAccessTech, targetAccessTech, reasonInfo);
+    }
+
+    /**
+     * Called when session access technology change fails.
+     *
+     * @param srcAccessTech original access technology
+     * @param targetAccessTech new access technology
+     * @param reasonInfo handover failure reason
+     */
+    public void callSessionHandoverFailed(int srcAccessTech, int targetAccessTech,
+            ImsReasonInfo reasonInfo) throws RemoteException {
+        mListener.callSessionHandoverFailed(srcAccessTech, targetAccessTech, reasonInfo);
+    }
+
+    /**
+     * Called when the TTY mode is changed by the remote party.
+     *
+     * @param mode one of the following: -
+     *             {@link com.android.internal.telephony.Phone#TTY_MODE_OFF} -
+     *             {@link com.android.internal.telephony.Phone#TTY_MODE_FULL} -
+     *             {@link com.android.internal.telephony.Phone#TTY_MODE_HCO} -
+     *             {@link com.android.internal.telephony.Phone#TTY_MODE_VCO}
+     */
+    public void callSessionTtyModeReceived(int mode) throws RemoteException {
+        mListener.callSessionTtyModeReceived(mode);
+    }
+
+    /**
+     * Called when the multiparty state is changed for this {@code ImsCallSession}.
+     *
+     * @param isMultiParty {@code true} if the session became multiparty,
+     *                     {@code false} otherwise.
+     */
+
+    public void callSessionMultipartyStateChanged(boolean isMultiParty) throws RemoteException {
+        mListener.callSessionMultipartyStateChanged(isMultiParty);
+    }
+
+    /**
+     * Called when the supplementary service information is received for the current session.
+     */
+    public void callSessionSuppServiceReceived(ImsSuppServiceNotification suppSrvNotification)
+            throws RemoteException {
+        mListener.callSessionSuppServiceReceived(suppSrvNotification);
+    }
+
+    /**
+     * Received RTT modify request from the remote party.
+     *
+     * @param callProfile ImsCallProfile with updated attributes
+     */
+    public void callSessionRttModifyRequestReceived(ImsCallProfile callProfile)
+            throws RemoteException {
+        mListener.callSessionRttModifyRequestReceived(callProfile);
+    }
+
+    /**
+     * @param status the received response for RTT modify request.
+     */
+    public void callSessionRttModifyResponseReceived(int status) throws RemoteException {
+        mListener.callSessionRttModifyResponseReceived(status);
+    }
+
+    /**
+     * Device received RTT message from Remote UE.
+     *
+     * @param rttMessage RTT message received
+     */
+    public void callSessionRttMessageReceived(String rttMessage) throws RemoteException {
+        mListener.callSessionRttMessageReceived(rttMessage);
+    }
+}
+
diff --git a/telephony/java/android/telephony/ims/internal/ImsService.java b/telephony/java/android/telephony/ims/internal/ImsService.java
new file mode 100644
index 0000000..b7c8ca0
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/ImsService.java
@@ -0,0 +1,339 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package android.telephony.ims.internal;
+
+import android.app.Service;
+import android.content.Intent;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.telephony.CarrierConfigManager;
+import android.telephony.ims.internal.aidl.IImsConfig;
+import android.telephony.ims.internal.aidl.IImsMmTelFeature;
+import android.telephony.ims.internal.aidl.IImsRcsFeature;
+import android.telephony.ims.internal.aidl.IImsRegistration;
+import android.telephony.ims.internal.aidl.IImsServiceController;
+import android.telephony.ims.internal.aidl.IImsServiceControllerListener;
+import android.telephony.ims.internal.feature.ImsFeature;
+import android.telephony.ims.internal.feature.MmTelFeature;
+import android.telephony.ims.internal.feature.RcsFeature;
+import android.telephony.ims.internal.stub.ImsConfigImplBase;
+import android.telephony.ims.internal.stub.ImsFeatureConfiguration;
+import android.telephony.ims.internal.stub.ImsRegistrationImplBase;
+import android.util.Log;
+import android.util.SparseArray;
+
+import com.android.ims.internal.IImsFeatureStatusCallback;
+import com.android.internal.annotations.VisibleForTesting;
+
+/**
+ * Main ImsService implementation, which binds via the Telephony ImsResolver. Services that extend
+ * ImsService must register the service in their AndroidManifest to be detected by the framework.
+ * First, the application must declare that they use the "android.permission.BIND_IMS_SERVICE"
+ * permission. Then, the ImsService definition in the manifest must follow the following format:
+ *
+ * ...
+ * <service android:name=".EgImsService"
+ *     android:permission="android.permission.BIND_IMS_SERVICE" >
+ *     <!-- Apps must declare which features they support as metadata. The different categories are
+ *     defined below. In this example, the RCS_FEATURE feature is supported. -->
+ *     <meta-data android:name="android.telephony.ims.RCS_FEATURE" android:value="true" />
+ *     <intent-filter>
+ *         <action android:name="android.telephony.ims.ImsService" />
+ *     </intent-filter>
+ * </service>
+ * ...
+ *
+ * The telephony framework will then bind to the ImsService you have defined in your manifest
+ * if you are either:
+ * 1) Defined as the default ImsService for the device in the device overlay using
+ *    "config_ims_package".
+ * 2) Defined as a Carrier Provided ImsService in the Carrier Configuration using
+ *    {@link CarrierConfigManager#KEY_CONFIG_IMS_PACKAGE_OVERRIDE_STRING}.
+ *
+ * The features that are currently supported in an ImsService are:
+ * - RCS_FEATURE: This ImsService implements the RcsFeature class.
+ * - MMTEL_FEATURE: This ImsService implements the MmTelFeature class.
+ *   @hide
+ */
+public class ImsService extends Service {
+
+    private static final String LOG_TAG = "ImsService";
+
+    /**
+     * The intent that must be defined as an intent-filter in the AndroidManifest of the ImsService.
+     * @hide
+     */
+    public static final String SERVICE_INTERFACE = "android.telephony.ims.ImsService";
+
+    // A map of slot Id -> map of features (indexed by ImsFeature feature id) corresponding to that
+    // slot.
+    // We keep track of this to facilitate cleanup of the IImsFeatureStatusCallback and
+    // call ImsFeature#onFeatureRemoved.
+    private final SparseArray<SparseArray<ImsFeature>> mFeaturesBySlot = new SparseArray<>();
+
+    private IImsServiceControllerListener mListener;
+
+
+    /**
+     * Listener that notifies the framework of ImsService changes.
+     */
+    public static class Listener extends IImsServiceControllerListener.Stub {
+        /**
+         * The IMS features that this ImsService supports has changed.
+         * @param c a new {@link ImsFeatureConfiguration} containing {@link ImsFeature.FeatureType}s
+         *   that this ImsService supports. This may trigger the addition/removal of feature
+         *   in this service.
+         */
+        public void onUpdateSupportedImsFeatures(ImsFeatureConfiguration c) {
+        }
+    }
+
+    /**
+     * @hide
+     */
+    protected final IBinder mImsServiceController = new IImsServiceController.Stub() {
+        @Override
+        public void setListener(IImsServiceControllerListener l) {
+            mListener = l;
+        }
+
+        @Override
+        public IImsMmTelFeature createMmTelFeature(int slotId, IImsFeatureStatusCallback c) {
+            return createMmTelFeatureInternal(slotId, c);
+        }
+
+        @Override
+        public IImsRcsFeature createRcsFeature(int slotId, IImsFeatureStatusCallback c) {
+            return createRcsFeatureInternal(slotId, c);
+        }
+
+        @Override
+        public void removeImsFeature(int slotId, int featureType, IImsFeatureStatusCallback c)
+                throws RemoteException {
+            ImsService.this.removeImsFeature(slotId, featureType, c);
+        }
+
+        @Override
+        public ImsFeatureConfiguration querySupportedImsFeatures() {
+            return ImsService.this.querySupportedImsFeatures();
+        }
+
+        @Override
+        public void notifyImsServiceReadyForFeatureCreation() {
+            ImsService.this.readyForFeatureCreation();
+        }
+
+        @Override
+        public void notifyImsFeatureReady(int slotId, int featureType)
+                throws RemoteException {
+            ImsService.this.notifyImsFeatureReady(slotId, featureType);
+        }
+
+        @Override
+        public IImsConfig getConfig(int slotId) throws RemoteException {
+            ImsConfigImplBase c = ImsService.this.getConfig(slotId);
+            return c != null ? c.getBinder() : null;
+        }
+
+        @Override
+        public IImsRegistration getRegistration(int slotId) throws RemoteException {
+            ImsRegistrationImplBase r = ImsService.this.getRegistration(slotId);
+            return r != null ? r.getBinder() : null;
+        }
+    };
+
+    /**
+     * @hide
+     */
+    @Override
+    public IBinder onBind(Intent intent) {
+        if(SERVICE_INTERFACE.equals(intent.getAction())) {
+            Log.i(LOG_TAG, "ImsService Bound.");
+            return mImsServiceController;
+        }
+        return null;
+    }
+
+    /**
+     * @hide
+     */
+    @VisibleForTesting
+    public SparseArray<ImsFeature> getFeatures(int slotId) {
+        return mFeaturesBySlot.get(slotId);
+    }
+
+    private IImsMmTelFeature createMmTelFeatureInternal(int slotId,
+            IImsFeatureStatusCallback c) {
+        MmTelFeature f = createMmTelFeature(slotId);
+        if (f != null) {
+            setupFeature(f, slotId, ImsFeature.FEATURE_MMTEL, c);
+            return f.getBinder();
+        } else {
+            Log.e(LOG_TAG, "createMmTelFeatureInternal: null feature returned.");
+            return null;
+        }
+    }
+
+    private IImsRcsFeature createRcsFeatureInternal(int slotId,
+            IImsFeatureStatusCallback c) {
+        RcsFeature f = createRcsFeature(slotId);
+        if (f != null) {
+            setupFeature(f, slotId, ImsFeature.FEATURE_RCS, c);
+            return f.getBinder();
+        } else {
+            Log.e(LOG_TAG, "createRcsFeatureInternal: null feature returned.");
+            return null;
+        }
+    }
+
+    private void setupFeature(ImsFeature f, int slotId, int featureType,
+            IImsFeatureStatusCallback c) {
+        f.addImsFeatureStatusCallback(c);
+        f.initialize(this, slotId);
+        addImsFeature(slotId, featureType, f);
+    }
+
+    private void addImsFeature(int slotId, int featureType, ImsFeature f) {
+        synchronized (mFeaturesBySlot) {
+            // Get SparseArray for Features, by querying slot Id
+            SparseArray<ImsFeature> features = mFeaturesBySlot.get(slotId);
+            if (features == null) {
+                // Populate new SparseArray of features if it doesn't exist for this slot yet.
+                features = new SparseArray<>();
+                mFeaturesBySlot.put(slotId, features);
+            }
+            features.put(featureType, f);
+        }
+    }
+
+    private void removeImsFeature(int slotId, int featureType,
+            IImsFeatureStatusCallback c) {
+        synchronized (mFeaturesBySlot) {
+            // get ImsFeature associated with the slot/feature
+            SparseArray<ImsFeature> features = mFeaturesBySlot.get(slotId);
+            if (features == null) {
+                Log.w(LOG_TAG, "Can not remove ImsFeature. No ImsFeatures exist on slot "
+                        + slotId);
+                return;
+            }
+            ImsFeature f = features.get(featureType);
+            if (f == null) {
+                Log.w(LOG_TAG, "Can not remove ImsFeature. No feature with type "
+                        + featureType + " exists on slot " + slotId);
+                return;
+            }
+            f.removeImsFeatureStatusCallback(c);
+            f.onFeatureRemoved();
+            features.remove(featureType);
+        }
+    }
+
+    private void notifyImsFeatureReady(int slotId, int featureType) {
+        synchronized (mFeaturesBySlot) {
+            // get ImsFeature associated with the slot/feature
+            SparseArray<ImsFeature> features = mFeaturesBySlot.get(slotId);
+            if (features == null) {
+                Log.w(LOG_TAG, "Can not notify ImsFeature ready. No ImsFeatures exist on " +
+                        "slot " + slotId);
+                return;
+            }
+            ImsFeature f = features.get(featureType);
+            if (f == null) {
+                Log.w(LOG_TAG, "Can not notify ImsFeature ready. No feature with type "
+                        + featureType + " exists on slot " + slotId);
+                return;
+            }
+            f.onFeatureReady();
+        }
+    }
+
+    /**
+     * When called, provide the {@link ImsFeatureConfiguration} that this ImsService currently
+     * supports. This will trigger the framework to set up the {@link ImsFeature}s that correspond
+     * to the {@link ImsFeature.FeatureType}s configured here.
+     * @return an {@link ImsFeatureConfiguration} containing Features this ImsService supports,
+     * defined in {@link ImsFeature.FeatureType}.
+     */
+    public ImsFeatureConfiguration querySupportedImsFeatures() {
+        // Return empty for base implementation
+        return new ImsFeatureConfiguration();
+    }
+
+    /**
+     * Updates the framework with a new {@link ImsFeatureConfiguration} containing the updated
+     * features, defined in {@link ImsFeature.FeatureType} that this ImsService supports. This may
+     * trigger the framework to add/remove new ImsFeatures, depending on the configuration.
+     */
+    public final void onUpdateSupportedImsFeatures(ImsFeatureConfiguration c)
+            throws RemoteException {
+        if (mListener == null) {
+            throw new IllegalStateException("Framework is not ready");
+        }
+        mListener.onUpdateSupportedImsFeatures(c);
+    }
+
+    /**
+     * The ImsService has been bound and is ready for ImsFeature creation based on the Features that
+     * the ImsService has registered for with the framework, either in the manifest or via
+     * The ImsService should use this signal instead of onCreate/onBind or similar to perform
+     * feature initialization because the framework may bind to this service multiple times to
+     * query the ImsService's {@link ImsFeatureConfiguration} via
+     * {@link #querySupportedImsFeatures()}before creating features.
+     */
+    public void readyForFeatureCreation() {
+    }
+
+    /**
+     * When called, the framework is requesting that a new MmTelFeature is created for the specified
+     * slot.
+     *
+     * @param slotId The slot ID that the MMTel Feature is being created for.
+     * @return The newly created MmTelFeature associated with the slot or null if the feature is not
+     * supported.
+     */
+    public MmTelFeature createMmTelFeature(int slotId) {
+        return null;
+    }
+
+    /**
+     * When called, the framework is requesting that a new RcsFeature is created for the specified
+     * slot
+     *
+     * @param slotId The slot ID that the RCS Feature is being created for.
+     * @return The newly created RcsFeature associated with the slot or null if the feature is not
+     * supported.
+     */
+    public RcsFeature createRcsFeature(int slotId) {
+        return null;
+    }
+
+    /**
+     * @param slotId The slot that the IMS configuration is associated with.
+     * @return ImsConfig implementation that is associated with the specified slot.
+     */
+    public ImsConfigImplBase getConfig(int slotId) {
+        return new ImsConfigImplBase();
+    }
+
+    /**
+     * @param slotId The slot that is associated with the IMS Registration.
+     * @return the ImsRegistration implementation associated with the slot.
+     */
+    public ImsRegistrationImplBase getRegistration(int slotId) {
+        return new ImsRegistrationImplBase();
+    }
+}
diff --git a/telephony/java/android/telephony/ims/internal/aidl/IImsCallSessionListener.aidl b/telephony/java/android/telephony/ims/internal/aidl/IImsCallSessionListener.aidl
new file mode 100644
index 0000000..2fb6744
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/aidl/IImsCallSessionListener.aidl
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims.internal.aidl;
+
+import com.android.ims.ImsStreamMediaProfile;
+import com.android.ims.ImsCallProfile;
+import com.android.ims.ImsReasonInfo;
+import com.android.ims.ImsConferenceState;
+import com.android.ims.internal.IImsCallSession;
+import com.android.ims.ImsSuppServiceNotification;
+
+/**
+ * A listener type for receiving notification on IMS call session events.
+ * When an event is generated for an {@link IImsCallSession}, the application is notified
+ * by having one of the methods called on the {@link IImsCallSessionListener}.
+ * {@hide}
+ */
+oneway interface IImsCallSessionListener {
+    /**
+     * Notifies the result of the basic session operation (setup / terminate).
+     */
+    void callSessionProgressing(in ImsStreamMediaProfile profile);
+    void callSessionInitiated(in ImsCallProfile profile);
+    void callSessionInitiatedFailed(in ImsReasonInfo reasonInfo);
+    void callSessionTerminated(in ImsReasonInfo reasonInfo);
+
+    /**
+     * Notifies the result of the call hold/resume operation.
+     */
+    void callSessionHeld(in ImsCallProfile profile);
+    void callSessionHoldFailed(in ImsReasonInfo reasonInfo);
+    void callSessionHoldReceived(in ImsCallProfile profile);
+    void callSessionResumed(in ImsCallProfile profile);
+    void callSessionResumeFailed(in ImsReasonInfo reasonInfo);
+    void callSessionResumeReceived(in ImsCallProfile profile);
+
+    /**
+     * Notifies the result of call merge operation.
+     */
+    void callSessionMergeStarted(IImsCallSession newSession, in ImsCallProfile profile);
+    void callSessionMergeComplete(IImsCallSession session);
+    void callSessionMergeFailed(in ImsReasonInfo reasonInfo);
+
+    /**
+     * Notifies the result of call upgrade / downgrade or any other call updates.
+     */
+    void callSessionUpdated(in ImsCallProfile profile);
+    void callSessionUpdateFailed(in ImsReasonInfo reasonInfo);
+    void callSessionUpdateReceived(in ImsCallProfile profile);
+
+    /**
+     * Notifies the result of conference extension.
+     */
+    void callSessionConferenceExtended(IImsCallSession newSession, in ImsCallProfile profile);
+    void callSessionConferenceExtendFailed(in ImsReasonInfo reasonInfo);
+    void callSessionConferenceExtendReceived(IImsCallSession newSession,
+            in ImsCallProfile profile);
+
+    /**
+     * Notifies the result of the participant invitation / removal to/from the conference session.
+     */
+    void callSessionInviteParticipantsRequestDelivered();
+    void callSessionInviteParticipantsRequestFailed(in ImsReasonInfo reasonInfo);
+    void callSessionRemoveParticipantsRequestDelivered();
+    void callSessionRemoveParticipantsRequestFailed(in ImsReasonInfo reasonInfo);
+
+    /**
+     * Notifies the changes of the conference info. in the conference session.
+     */
+    void callSessionConferenceStateUpdated(in ImsConferenceState state);
+
+    /**
+     * Notifies the incoming USSD message.
+     */
+    void callSessionUssdMessageReceived(int mode, String ussdMessage);
+
+    /**
+     * Notifies of handover information for this call
+     */
+    void callSessionHandover(int srcAccessTech, int targetAccessTech,
+            in ImsReasonInfo reasonInfo);
+    void callSessionHandoverFailed(int srcAccessTech, int targetAccessTech,
+            in ImsReasonInfo reasonInfo);
+    void callSessionMayHandover(int srcAccessTech, int targetAccessTech);
+
+    /**
+     * Notifies the TTY mode change by remote party.
+     * @param mode one of the following:
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_OFF}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_FULL}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_HCO}
+     * - {@link com.android.internal.telephony.Phone#TTY_MODE_VCO}
+     */
+    void callSessionTtyModeReceived(int mode);
+
+    /**
+     * Notifies of a change to the multiparty state for this {@code ImsCallSession}.
+     *
+     * @param session The call session.
+     * @param isMultiParty {@code true} if the session became multiparty, {@code false} otherwise.
+     */
+    void callSessionMultipartyStateChanged(boolean isMultiParty);
+
+    /**
+     * Notifies the supplementary service information for the current session.
+     */
+    void callSessionSuppServiceReceived(in ImsSuppServiceNotification suppSrvNotification);
+
+    /**
+     * Device received RTT modify request from Remote UE
+     * @param session ImsCallProfile with updated attribute
+     */
+    void callSessionRttModifyRequestReceived(in ImsCallProfile callProfile);
+
+    /* Device issued RTT modify request and inturn received response
+     * from Remote UE
+     * @param status Will be one of the following values from:
+     * - {@link Connection.RttModifyStatus}
+     */
+    void callSessionRttModifyResponseReceived(int status);
+
+    /*
+     * While in call, device received RTT message from Remote UE
+     * @param rttMessage Received RTT message
+     */
+    void callSessionRttMessageReceived(in String rttMessage);
+}
diff --git a/telephony/java/android/telephony/ims/internal/aidl/IImsCapabilityCallback.aidl b/telephony/java/android/telephony/ims/internal/aidl/IImsCapabilityCallback.aidl
new file mode 100644
index 0000000..fd2eb24
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/aidl/IImsCapabilityCallback.aidl
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims.internal.aidl;
+
+/**
+ * See ImsFeature#CapabilityCallback for more information.
+ * {@hide}
+ */
+oneway interface IImsCapabilityCallback {
+    void onQueryCapabilityConfiguration(int capability, int radioTech, boolean enabled);
+    void onChangeCapabilityConfigurationError(int capability, int radioTech, int reason);
+    void onCapabilitiesStatusChanged(int config);
+}
diff --git a/telephony/java/android/telephony/ims/internal/aidl/IImsConfig.aidl b/telephony/java/android/telephony/ims/internal/aidl/IImsConfig.aidl
new file mode 100644
index 0000000..3d424a3
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/aidl/IImsConfig.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package android.telephony.ims.internal.aidl;
+
+import android.telephony.ims.internal.aidl.IImsConfigCallback;
+
+import com.android.ims.ImsConfigListener;
+
+/**
+ * Provides APIs to get/set the IMS service feature/capability/parameters.
+ * The config items include items provisioned by the operator.
+ *
+ * {@hide}
+ */
+interface IImsConfig {
+
+    void addImsConfigCallback(IImsConfigCallback c);
+    void removeImsConfigCallback(IImsConfigCallback c);
+    int getConfigInt(int item);
+    String getConfigString(int item);
+    // Return result code defined in ImsConfig#OperationStatusConstants
+    int setConfigInt(int item, int value);
+    // Return result code defined in ImsConfig#OperationStatusConstants
+    int setConfigString(int item, String value);
+}
diff --git a/telephony/java/android/telephony/ims/internal/aidl/IImsConfigCallback.aidl b/telephony/java/android/telephony/ims/internal/aidl/IImsConfigCallback.aidl
new file mode 100644
index 0000000..52efd23
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/aidl/IImsConfigCallback.aidl
@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package android.telephony.ims.internal.aidl;
+
+/**
+ * Provides callback interface for ImsConfig when a value has changed.
+ *
+ * {@hide}
+ */
+oneway interface IImsConfigCallback {
+    void onIntConfigChanged(int item, int value);
+    void onStringConfigChanged(int item, String value);
+}
diff --git a/telephony/java/android/telephony/ims/internal/aidl/IImsMmTelFeature.aidl b/telephony/java/android/telephony/ims/internal/aidl/IImsMmTelFeature.aidl
new file mode 100644
index 0000000..7125781
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/aidl/IImsMmTelFeature.aidl
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims.internal.aidl;
+
+import android.os.Message;
+import android.telephony.ims.internal.aidl.IImsMmTelListener;
+import android.telephony.ims.internal.aidl.IImsCapabilityCallback;
+import android.telephony.ims.internal.aidl.IImsCallSessionListener;
+import android.telephony.ims.internal.feature.CapabilityChangeRequest;
+
+import com.android.ims.ImsCallProfile;
+import com.android.ims.internal.IImsCallSession;
+import com.android.ims.internal.IImsEcbm;
+import com.android.ims.internal.IImsMultiEndpoint;
+import com.android.ims.internal.IImsRegistrationListener;
+import com.android.ims.internal.IImsUt;
+
+/**
+ * See MmTelFeature for more information.
+ * {@hide}
+ */
+interface IImsMmTelFeature {
+    void setListener(IImsMmTelListener l);
+    int getFeatureState();
+    ImsCallProfile createCallProfile(int callSessionType, int callType);
+    IImsCallSession createCallSession(in ImsCallProfile profile, IImsCallSessionListener listener);
+    IImsUt getUtInterface();
+    IImsEcbm getEcbmInterface();
+    void setUiTtyMode(int uiTtyMode, in Message onCompleteMessage);
+    IImsMultiEndpoint getMultiEndpointInterface();
+    int queryCapabilityStatus();
+    oneway void addCapabilityCallback(IImsCapabilityCallback c);
+    oneway void removeCapabilityCallback(IImsCapabilityCallback c);
+    oneway void changeCapabilitiesConfiguration(in CapabilityChangeRequest request,
+            IImsCapabilityCallback c);
+    oneway void queryCapabilityConfiguration(int capability, int radioTech,
+            IImsCapabilityCallback c);
+}
diff --git a/telephony/java/android/telephony/ims/internal/aidl/IImsMmTelListener.aidl b/telephony/java/android/telephony/ims/internal/aidl/IImsMmTelListener.aidl
new file mode 100644
index 0000000..8332bc0
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/aidl/IImsMmTelListener.aidl
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims.internal.aidl;
+
+import com.android.ims.internal.IImsCallSession;
+
+/**
+ * See MmTelFeature#Listener for more information.
+ * {@hide}
+ */
+oneway interface IImsMmTelListener {
+    void onIncomingCall(IImsCallSession c);
+}
\ No newline at end of file
diff --git a/telephony/java/android/telephony/ims/internal/aidl/IImsRcsFeature.aidl b/telephony/java/android/telephony/ims/internal/aidl/IImsRcsFeature.aidl
new file mode 100644
index 0000000..f6005b6
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/aidl/IImsRcsFeature.aidl
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims.internal.aidl;
+
+/**
+ * See RcsFeature for more information.
+ * {@hide}
+ */
+interface IImsRcsFeature {
+    //Empty Default Implementation
+}
\ No newline at end of file
diff --git a/telephony/java/android/telephony/ims/internal/aidl/IImsRegistration.aidl b/telephony/java/android/telephony/ims/internal/aidl/IImsRegistration.aidl
new file mode 100644
index 0000000..687b7ca
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/aidl/IImsRegistration.aidl
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package android.telephony.ims.internal.aidl;
+
+import android.telephony.ims.internal.aidl.IImsRegistrationCallback;
+import android.telephony.ims.internal.stub.ImsFeatureConfiguration;
+
+/**
+ * See ImsRegistration for more information.
+ *
+ * {@hide}
+ */
+interface IImsRegistration {
+   int getRegistrationTechnology();
+   oneway void addRegistrationCallback(IImsRegistrationCallback c);
+   oneway void removeRegistrationCallback(IImsRegistrationCallback c);
+}
\ No newline at end of file
diff --git a/telephony/java/android/telephony/ims/internal/aidl/IImsRegistrationCallback.aidl b/telephony/java/android/telephony/ims/internal/aidl/IImsRegistrationCallback.aidl
new file mode 100644
index 0000000..a50575b
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/aidl/IImsRegistrationCallback.aidl
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package android.telephony.ims.internal.aidl;
+
+import android.telephony.ims.internal.stub.ImsFeatureConfiguration;
+
+import com.android.ims.ImsReasonInfo;
+
+/**
+ * See ImsRegistrationImplBase.Callback for more information.
+ *
+ * {@hide}
+ */
+oneway interface IImsRegistrationCallback {
+   void onRegistered(int imsRadioTech);
+   void onRegistering(int imsRadioTech);
+   void onDeregistered(in ImsReasonInfo info);
+   void onTechnologyChangeFailed(int imsRadioTech, in ImsReasonInfo info);
+}
\ No newline at end of file
diff --git a/telephony/java/android/telephony/ims/internal/aidl/IImsServiceController.aidl b/telephony/java/android/telephony/ims/internal/aidl/IImsServiceController.aidl
new file mode 100644
index 0000000..8afb955
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/aidl/IImsServiceController.aidl
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims.internal.aidl;
+
+import android.telephony.ims.internal.aidl.IImsMmTelFeature;
+import android.telephony.ims.internal.aidl.IImsRcsFeature;
+import android.telephony.ims.internal.aidl.IImsRegistration;
+import android.telephony.ims.internal.aidl.IImsConfig;
+import android.telephony.ims.internal.aidl.IImsServiceControllerListener;
+import android.telephony.ims.internal.stub.ImsFeatureConfiguration;
+
+import com.android.ims.internal.IImsFeatureStatusCallback;
+
+/**
+ * See ImsService and MmTelFeature for more information.
+ * {@hide}
+ */
+interface IImsServiceController {
+    void setListener(IImsServiceControllerListener l);
+    IImsMmTelFeature createMmTelFeature(int slotId, in IImsFeatureStatusCallback c);
+    IImsRcsFeature createRcsFeature(int slotId, in IImsFeatureStatusCallback c);
+    ImsFeatureConfiguration querySupportedImsFeatures();
+    // Synchronous call to ensure the ImsService is ready before continuing with feature creation.
+    void notifyImsServiceReadyForFeatureCreation();
+    // Synchronous call to ensure the new ImsFeature is ready before using the Feature.
+    void notifyImsFeatureReady(int slotId, int featureType);
+    void removeImsFeature(int slotId, int featureType, in IImsFeatureStatusCallback c);
+    IImsConfig getConfig(int slotId);
+    IImsRegistration getRegistration(int slotId);
+}
diff --git a/telephony/java/android/telephony/ims/internal/aidl/IImsServiceControllerListener.aidl b/telephony/java/android/telephony/ims/internal/aidl/IImsServiceControllerListener.aidl
new file mode 100644
index 0000000..01cca2db
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/aidl/IImsServiceControllerListener.aidl
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims.internal.aidl;
+
+import android.telephony.ims.internal.stub.ImsFeatureConfiguration;
+
+/**
+ * See ImsService#Listener for more information.
+ * {@hide}
+ */
+oneway interface IImsServiceControllerListener {
+    void onUpdateSupportedImsFeatures(in ImsFeatureConfiguration c);
+}
diff --git a/telephony/java/android/telephony/ims/internal/feature/CapabilityChangeRequest.aidl b/telephony/java/android/telephony/ims/internal/feature/CapabilityChangeRequest.aidl
new file mode 100644
index 0000000..f4ec0eb
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/feature/CapabilityChangeRequest.aidl
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package android.telephony.ims.internal.feature;
+
+parcelable CapabilityChangeRequest;
diff --git a/telephony/java/android/telephony/ims/internal/feature/CapabilityChangeRequest.java b/telephony/java/android/telephony/ims/internal/feature/CapabilityChangeRequest.java
new file mode 100644
index 0000000..4d18873
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/feature/CapabilityChangeRequest.java
@@ -0,0 +1,197 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package android.telephony.ims.internal.feature;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.telephony.ims.internal.stub.ImsRegistrationImplBase;
+import android.util.ArraySet;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Request to send to IMS provider, which will try to enable/disable capabilities that are added to
+ * the request.
+ * {@hide}
+ */
+public class CapabilityChangeRequest implements Parcelable {
+
+    public static class CapabilityPair {
+        private final int mCapability;
+        private final int radioTech;
+
+        public CapabilityPair(int capability, int radioTech) {
+            this.mCapability = capability;
+            this.radioTech = radioTech;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (!(o instanceof CapabilityPair)) return false;
+
+            CapabilityPair that = (CapabilityPair) o;
+
+            if (getCapability() != that.getCapability()) return false;
+            return getRadioTech() == that.getRadioTech();
+        }
+
+        @Override
+        public int hashCode() {
+            int result = getCapability();
+            result = 31 * result + getRadioTech();
+            return result;
+        }
+
+        public @MmTelFeature.MmTelCapabilities.MmTelCapability int getCapability() {
+            return mCapability;
+        }
+
+        public @ImsRegistrationImplBase.ImsRegistrationTech int getRadioTech() {
+            return radioTech;
+        }
+    }
+
+    // Pair contains <radio tech, mCapability>
+    private final Set<CapabilityPair> mCapabilitiesToEnable;
+    // Pair contains <radio tech, mCapability>
+    private final Set<CapabilityPair> mCapabilitiesToDisable;
+
+    public CapabilityChangeRequest() {
+        mCapabilitiesToEnable = new ArraySet<>();
+        mCapabilitiesToDisable = new ArraySet<>();
+    }
+
+    /**
+     * Add one or many capabilities to the request to be enabled.
+     *
+     * @param capabilities A bitfield of capabilities to enable, valid values are defined in
+     *   {@link MmTelFeature.MmTelCapabilities.MmTelCapability}.
+     * @param radioTech  the radio tech that these capabilities should be enabled for, valid
+     *   values are in {@link ImsRegistrationImplBase.ImsRegistrationTech}.
+     */
+    public void addCapabilitiesToEnableForTech(
+            @MmTelFeature.MmTelCapabilities.MmTelCapability int capabilities,
+            @ImsRegistrationImplBase.ImsRegistrationTech int radioTech) {
+        addAllCapabilities(mCapabilitiesToEnable, capabilities, radioTech);
+    }
+
+    /**
+     * Add one or many capabilities to the request to be disabled.
+     * @param capabilities A bitfield of capabilities to diable, valid values are defined in
+     *   {@link MmTelFeature.MmTelCapabilities.MmTelCapability}.
+     * @param radioTech the radio tech that these capabilities should be disabled for, valid
+     *   values are in {@link ImsRegistrationImplBase.ImsRegistrationTech}.
+     */
+    public void addCapabilitiesToDisableForTech(
+            @MmTelFeature.MmTelCapabilities.MmTelCapability int capabilities,
+            @ImsRegistrationImplBase.ImsRegistrationTech int radioTech) {
+        addAllCapabilities(mCapabilitiesToDisable, capabilities, radioTech);
+    }
+
+    /**
+     * @return a {@link List} of {@link CapabilityPair}s that are requesting to be enabled.
+     */
+    public List<CapabilityPair> getCapabilitiesToEnable() {
+        return new ArrayList<>(mCapabilitiesToEnable);
+    }
+
+    /**
+     * @return a {@link List} of {@link CapabilityPair}s that are requesting to be disabled.
+     */
+    public List<CapabilityPair> getCapabilitiesToDisable() {
+        return new ArrayList<>(mCapabilitiesToDisable);
+    }
+
+    // Iterate through capabilities bitfield and add each one as a pair associated with the radio
+    // technology
+    private void addAllCapabilities(Set<CapabilityPair> set, int capabilities, int tech) {
+        long highestCapability = Long.highestOneBit(capabilities);
+        for (int i = 1; i <= highestCapability; i *= 2) {
+            if ((i & capabilities) > 0) {
+                set.add(new CapabilityPair(/*capability*/ i, /*radioTech*/ tech));
+            }
+        }
+    }
+
+    protected CapabilityChangeRequest(Parcel in) {
+        int enableSize = in.readInt();
+        mCapabilitiesToEnable = new ArraySet<>(enableSize);
+        for (int i = 0; i < enableSize; i++) {
+            mCapabilitiesToEnable.add(new CapabilityPair(/*capability*/ in.readInt(),
+                    /*radioTech*/ in.readInt()));
+        }
+        int disableSize = in.readInt();
+        mCapabilitiesToDisable = new ArraySet<>(disableSize);
+        for (int i = 0; i < disableSize; i++) {
+            mCapabilitiesToDisable.add(new CapabilityPair(/*capability*/ in.readInt(),
+                    /*radioTech*/ in.readInt()));
+        }
+    }
+
+    public static final Creator<CapabilityChangeRequest> CREATOR =
+            new Creator<CapabilityChangeRequest>() {
+                @Override
+                public CapabilityChangeRequest createFromParcel(Parcel in) {
+                    return new CapabilityChangeRequest(in);
+                }
+
+                @Override
+                public CapabilityChangeRequest[] newArray(int size) {
+                    return new CapabilityChangeRequest[size];
+                }
+            };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(mCapabilitiesToEnable.size());
+        for (CapabilityPair pair : mCapabilitiesToEnable) {
+            dest.writeInt(pair.getCapability());
+            dest.writeInt(pair.getRadioTech());
+        }
+        dest.writeInt(mCapabilitiesToDisable.size());
+        for (CapabilityPair pair : mCapabilitiesToDisable) {
+            dest.writeInt(pair.getCapability());
+            dest.writeInt(pair.getRadioTech());
+        }
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof CapabilityChangeRequest)) return false;
+
+        CapabilityChangeRequest that = (CapabilityChangeRequest) o;
+
+        if (!mCapabilitiesToEnable.equals(that.mCapabilitiesToEnable)) return false;
+        return mCapabilitiesToDisable.equals(that.mCapabilitiesToDisable);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = mCapabilitiesToEnable.hashCode();
+        result = 31 * result + mCapabilitiesToDisable.hashCode();
+        return result;
+    }
+}
diff --git a/telephony/java/android/telephony/ims/internal/feature/ImsFeature.java b/telephony/java/android/telephony/ims/internal/feature/ImsFeature.java
new file mode 100644
index 0000000..9f82ad2
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/feature/ImsFeature.java
@@ -0,0 +1,462 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package android.telephony.ims.internal.feature;
+
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.content.Context;
+import android.content.Intent;
+import android.os.IInterface;
+import android.os.RemoteCallbackList;
+import android.os.RemoteException;
+import android.telephony.SubscriptionManager;
+import android.telephony.ims.internal.aidl.IImsCapabilityCallback;
+import android.util.Log;
+
+import com.android.ims.internal.IImsFeatureStatusCallback;
+import com.android.internal.annotations.VisibleForTesting;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.Set;
+import java.util.WeakHashMap;
+
+/**
+ * Base class for all IMS features that are supported by the framework.
+ *
+ * @hide
+ */
+public abstract class ImsFeature {
+
+    private static final String LOG_TAG = "ImsFeature";
+
+    /**
+     * Action to broadcast when ImsService is up.
+     * Internal use only.
+     * Only defined here separately for compatibility purposes with the old ImsService.
+     *
+     * @hide
+     */
+    public static final String ACTION_IMS_SERVICE_UP =
+            "com.android.ims.IMS_SERVICE_UP";
+
+    /**
+     * Action to broadcast when ImsService is down.
+     * Internal use only.
+     * Only defined here separately for compatibility purposes with the old ImsService.
+     *
+     * @hide
+     */
+    public static final String ACTION_IMS_SERVICE_DOWN =
+            "com.android.ims.IMS_SERVICE_DOWN";
+
+    /**
+     * Part of the ACTION_IMS_SERVICE_UP or _DOWN intents.
+     * A long value; the phone ID corresponding to the IMS service coming up or down.
+     * Only defined here separately for compatibility purposes with the old ImsService.
+     *
+     * @hide
+     */
+    public static final String EXTRA_PHONE_ID = "android:phone_id";
+
+    // Invalid feature value
+    public static final int FEATURE_INVALID = -1;
+    // ImsFeatures that are defined in the Manifests. Ensure that these values match the previously
+    // defined values in ImsServiceClass for compatibility purposes.
+    public static final int FEATURE_EMERGENCY_MMTEL = 0;
+    public static final int FEATURE_MMTEL = 1;
+    public static final int FEATURE_RCS = 2;
+    // Total number of features defined
+    public static final int FEATURE_MAX = 3;
+
+    // Integer values defining IMS features that are supported in ImsFeature.
+    @IntDef(flag = true,
+            value = {
+                    FEATURE_EMERGENCY_MMTEL,
+                    FEATURE_MMTEL,
+                    FEATURE_RCS
+            })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface FeatureType {}
+
+    // Integer values defining the state of the ImsFeature at any time.
+    @IntDef(flag = true,
+            value = {
+                    STATE_UNAVAILABLE,
+                    STATE_INITIALIZING,
+                    STATE_READY,
+            })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface ImsState {}
+
+    public static final int STATE_UNAVAILABLE = 0;
+    public static final int STATE_INITIALIZING = 1;
+    public static final int STATE_READY = 2;
+
+    // Integer values defining the result codes that should be returned from
+    // {@link changeEnabledCapabilities} when the framework tries to set a feature's capability.
+    @IntDef(flag = true,
+            value = {
+                    CAPABILITY_ERROR_GENERIC,
+                    CAPABILITY_SUCCESS
+            })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface ImsCapabilityError {}
+
+    public static final int CAPABILITY_ERROR_GENERIC = -1;
+    public static final int CAPABILITY_SUCCESS = 0;
+
+
+    /**
+     * The framework implements this callback in order to register for Feature Capability status
+     * updates, via {@link #onCapabilitiesStatusChanged(Capabilities)}, query Capability
+     * configurations, via {@link #onQueryCapabilityConfiguration}, as well as to receive error
+     * callbacks when the ImsService can not change the capability as requested, via
+     * {@link #onChangeCapabilityConfigurationError}.
+     */
+    public static class CapabilityCallback extends IImsCapabilityCallback.Stub {
+
+        @Override
+        public final void onCapabilitiesStatusChanged(int config) throws RemoteException {
+            onCapabilitiesStatusChanged(new Capabilities(config));
+        }
+
+        /**
+         * Returns the result of a query for the capability configuration of a requested capability.
+         *
+         * @param capability The capability that was requested.
+         * @param radioTech The IMS radio technology associated with the capability.
+         * @param isEnabled true if the capability is enabled, false otherwise.
+         */
+        @Override
+        public void onQueryCapabilityConfiguration(int capability, int radioTech,
+                boolean isEnabled) {
+
+        }
+
+        /**
+         * Called when a change to the capability configuration has returned an error.
+         *
+         * @param capability The capability that was requested to be changed.
+         * @param radioTech The IMS radio technology associated with the capability.
+         * @param reason error associated with the failure to change configuration.
+         */
+        @Override
+        public void onChangeCapabilityConfigurationError(int capability, int radioTech,
+                int reason) {
+        }
+
+        /**
+         * The status of the feature's capabilities has changed to either available or unavailable.
+         * If unavailable, the feature is not able to support the unavailable capability at this
+         * time.
+         *
+         * @param config The new availability of the capabilities.
+         */
+        public void onCapabilitiesStatusChanged(Capabilities config) {
+        }
+    }
+
+    /**
+     * Used by the ImsFeature to call back to the CapabilityCallback that the framework has
+     * provided.
+     */
+    protected static class CapabilityCallbackProxy {
+        private final IImsCapabilityCallback mCallback;
+
+        public CapabilityCallbackProxy(IImsCapabilityCallback c) {
+            mCallback = c;
+        }
+
+        /**
+         * This method notifies the provided framework callback that the request to change the
+         * indicated capability has failed and has not changed.
+         *
+         * @param capability The Capability that will be notified to the framework.
+         * @param radioTech The radio tech that this capability failed for.
+         * @param reason The reason this capability was unable to be changed.
+         */
+        public void onChangeCapabilityConfigurationError(int capability, int radioTech,
+                @ImsCapabilityError int reason) {
+            try {
+                mCallback.onChangeCapabilityConfigurationError(capability, radioTech, reason);
+            } catch (RemoteException e) {
+                Log.e(LOG_TAG, "onChangeCapabilityConfigurationError called on dead binder.");
+            }
+        }
+
+        public void onQueryCapabilityConfiguration(int capability, int radioTech,
+                boolean isEnabled) {
+            try {
+                mCallback.onQueryCapabilityConfiguration(capability, radioTech, isEnabled);
+            } catch (RemoteException e) {
+                Log.e(LOG_TAG, "onQueryCapabilityConfiguration called on dead binder.");
+            }
+        }
+    }
+
+    /**
+     * Contains the capabilities defined and supported by an ImsFeature in the form of a bit mask.
+     */
+    public static class Capabilities {
+        protected int mCapabilities = 0;
+
+        public Capabilities() {
+        }
+
+        protected Capabilities(int capabilities) {
+            mCapabilities = capabilities;
+        }
+
+        /**
+         * @param capabilities Capabilities to be added to the configuration in the form of a
+         *     bit mask.
+         */
+        public void addCapabilities(int capabilities) {
+            mCapabilities |= capabilities;
+        }
+
+        /**
+         * @param capabilities Capabilities to be removed to the configuration in the form of a
+         *     bit mask.
+         */
+        public void removeCapabilities(int capabilities) {
+            mCapabilities &= ~capabilities;
+        }
+
+        /**
+         * @return true if all of the capabilities specified are capable.
+         */
+        public boolean isCapable(int capabilities) {
+            return (mCapabilities & capabilities) == capabilities;
+        }
+
+        public Capabilities copy() {
+            return new Capabilities(mCapabilities);
+        }
+
+        /**
+         * @return a bitmask containing the capability flags directly.
+         */
+        public int getMask() {
+            return mCapabilities;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (!(o instanceof Capabilities)) return false;
+
+            Capabilities that = (Capabilities) o;
+
+            return mCapabilities == that.mCapabilities;
+        }
+
+        @Override
+        public int hashCode() {
+            return mCapabilities;
+        }
+    }
+
+    private final Set<IImsFeatureStatusCallback> mStatusCallbacks = Collections.newSetFromMap(
+            new WeakHashMap<IImsFeatureStatusCallback, Boolean>());
+    private @ImsState int mState = STATE_UNAVAILABLE;
+    private int mSlotId = SubscriptionManager.INVALID_SIM_SLOT_INDEX;
+    private Context mContext;
+    private final Object mLock = new Object();
+    private final RemoteCallbackList<IImsCapabilityCallback> mCapabilityCallbacks
+            = new RemoteCallbackList<>();
+    private Capabilities mCapabilityStatus = new Capabilities();
+
+    public final void initialize(Context context, int slotId) {
+        mContext = context;
+        mSlotId = slotId;
+    }
+
+    public final int getFeatureState() {
+        synchronized (mLock) {
+            return mState;
+        }
+    }
+
+    protected final void setFeatureState(@ImsState int state) {
+        synchronized (mLock) {
+            if (mState != state) {
+                mState = state;
+                notifyFeatureState(state);
+            }
+        }
+    }
+
+    // Not final for testing, but shouldn't be extended!
+    @VisibleForTesting
+    public void addImsFeatureStatusCallback(@NonNull IImsFeatureStatusCallback c) {
+        try {
+            // If we have just connected, send queued status.
+            c.notifyImsFeatureStatus(getFeatureState());
+            // Add the callback if the callback completes successfully without a RemoteException.
+            synchronized (mLock) {
+                mStatusCallbacks.add(c);
+            }
+        } catch (RemoteException e) {
+            Log.w(LOG_TAG, "Couldn't notify feature state: " + e.getMessage());
+        }
+    }
+
+    @VisibleForTesting
+    // Not final for testing, but should not be extended!
+    public void removeImsFeatureStatusCallback(@NonNull IImsFeatureStatusCallback c) {
+        synchronized (mLock) {
+            mStatusCallbacks.remove(c);
+        }
+    }
+
+    /**
+     * Internal method called by ImsFeature when setFeatureState has changed.
+     */
+    private void notifyFeatureState(@ImsState int state) {
+        synchronized (mLock) {
+            for (Iterator<IImsFeatureStatusCallback> iter = mStatusCallbacks.iterator();
+                    iter.hasNext(); ) {
+                IImsFeatureStatusCallback callback = iter.next();
+                try {
+                    Log.i(LOG_TAG, "notifying ImsFeatureState=" + state);
+                    callback.notifyImsFeatureStatus(state);
+                } catch (RemoteException e) {
+                    // remove if the callback is no longer alive.
+                    iter.remove();
+                    Log.w(LOG_TAG, "Couldn't notify feature state: " + e.getMessage());
+                }
+            }
+        }
+        sendImsServiceIntent(state);
+    }
+
+    /**
+     * Provide backwards compatibility using deprecated service UP/DOWN intents.
+     */
+    private void sendImsServiceIntent(@ImsState int state) {
+        if (mContext == null || mSlotId == SubscriptionManager.INVALID_SIM_SLOT_INDEX) {
+            return;
+        }
+        Intent intent;
+        switch (state) {
+            case ImsFeature.STATE_UNAVAILABLE:
+            case ImsFeature.STATE_INITIALIZING:
+                intent = new Intent(ACTION_IMS_SERVICE_DOWN);
+                break;
+            case ImsFeature.STATE_READY:
+                intent = new Intent(ACTION_IMS_SERVICE_UP);
+                break;
+            default:
+                intent = new Intent(ACTION_IMS_SERVICE_DOWN);
+        }
+        intent.putExtra(EXTRA_PHONE_ID, mSlotId);
+        mContext.sendBroadcast(intent);
+    }
+
+    public final void addCapabilityCallback(IImsCapabilityCallback c) {
+        mCapabilityCallbacks.register(c);
+    }
+
+    public final void removeCapabilityCallback(IImsCapabilityCallback c) {
+        mCapabilityCallbacks.unregister(c);
+    }
+
+    /**
+     * @return the cached capabilities status for this feature.
+     */
+    @VisibleForTesting
+    public Capabilities queryCapabilityStatus() {
+        synchronized (mLock) {
+            return mCapabilityStatus.copy();
+        }
+    }
+
+    // Called internally to request the change of enabled capabilities.
+    @VisibleForTesting
+    public final void requestChangeEnabledCapabilities(CapabilityChangeRequest request,
+            IImsCapabilityCallback c) throws RemoteException {
+        if (request == null) {
+            throw new IllegalArgumentException(
+                    "ImsFeature#requestChangeEnabledCapabilities called with invalid params.");
+        }
+        changeEnabledCapabilities(request, new CapabilityCallbackProxy(c));
+    }
+
+    /**
+     * Called by the ImsFeature when the capabilities status has changed.
+     *
+     * @param c A {@link Capabilities} containing the new Capabilities status.
+     */
+    protected final void notifyCapabilitiesStatusChanged(Capabilities c) {
+        synchronized (mLock) {
+            mCapabilityStatus = c.copy();
+        }
+        int count = mCapabilityCallbacks.beginBroadcast();
+        try {
+            for (int i = 0; i < count; i++) {
+                try {
+                    mCapabilityCallbacks.getBroadcastItem(i).onCapabilitiesStatusChanged(
+                            c.mCapabilities);
+                } catch (RemoteException e) {
+                    Log.w(LOG_TAG, e + " " + "notifyCapabilitiesStatusChanged() - Skipping " +
+                            "callback.");
+                }
+            }
+        } finally {
+            mCapabilityCallbacks.finishBroadcast();
+        }
+    }
+
+    /**
+     * Features should override this method to receive Capability preference change requests from
+     * the framework using the provided {@link CapabilityChangeRequest}. If any of the capabilities
+     * in the {@link CapabilityChangeRequest} are not able to be completed due to an error,
+     * {@link CapabilityCallbackProxy#onChangeCapabilityConfigurationError} should be called for
+     * each failed capability.
+     *
+     * @param request A {@link CapabilityChangeRequest} containing requested capabilities to
+     *     enable/disable.
+     * @param c A {@link CapabilityCallbackProxy}, which will be used to call back to the framework
+     * setting a subset of these capabilities fail, using
+     * {@link CapabilityCallbackProxy#onChangeCapabilityConfigurationError}.
+     */
+    public abstract void changeEnabledCapabilities(CapabilityChangeRequest request,
+            CapabilityCallbackProxy c);
+
+    /**
+     * Called when the framework is removing this feature and it needs to be cleaned up.
+     */
+    public abstract void onFeatureRemoved();
+
+    /**
+     * Called when the feature has been initialized and communication with the framework is set up.
+     * Any attempt by this feature to access the framework before this method is called will return
+     * with an {@link IllegalStateException}.
+     * The IMS provider should use this method to trigger registration for this feature on the IMS
+     * network, if needed.
+     */
+    public abstract void onFeatureReady();
+
+    /**
+     * @return Binder instance that the framework will use to communicate with this feature.
+     */
+    protected abstract IInterface getBinder();
+}
diff --git a/telephony/java/android/telephony/ims/internal/feature/MmTelFeature.java b/telephony/java/android/telephony/ims/internal/feature/MmTelFeature.java
new file mode 100644
index 0000000..f183a57
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/feature/MmTelFeature.java
@@ -0,0 +1,422 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package android.telephony.ims.internal.feature;
+
+import android.annotation.IntDef;
+import android.os.Message;
+import android.os.RemoteException;
+import android.telecom.TelecomManager;
+import android.telephony.ims.internal.ImsCallSessionListener;
+import android.telephony.ims.internal.aidl.IImsCallSessionListener;
+import android.telephony.ims.internal.aidl.IImsCapabilityCallback;
+import android.telephony.ims.internal.aidl.IImsMmTelFeature;
+import android.telephony.ims.internal.aidl.IImsMmTelListener;
+import android.telephony.ims.internal.stub.ImsRegistrationImplBase;
+import android.telephony.ims.stub.ImsEcbmImplBase;
+import android.telephony.ims.stub.ImsMultiEndpointImplBase;
+import android.telephony.ims.stub.ImsUtImplBase;
+import android.util.Log;
+
+import com.android.ims.ImsCallProfile;
+import com.android.ims.internal.IImsCallSession;
+import com.android.ims.internal.IImsEcbm;
+import com.android.ims.internal.IImsMultiEndpoint;
+import com.android.ims.internal.IImsUt;
+import com.android.ims.internal.ImsCallSession;
+import com.android.internal.annotations.VisibleForTesting;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Base implementation for Voice and SMS (IR-92) and Video (IR-94) IMS support.
+ *
+ * Any class wishing to use MmTelFeature should extend this class and implement all methods that the
+ * service supports.
+ * @hide
+ */
+
+public class MmTelFeature extends ImsFeature {
+
+    private static final String LOG_TAG = "MmTelFeature";
+
+    private final IImsMmTelFeature mImsMMTelBinder = new IImsMmTelFeature.Stub() {
+
+        @Override
+        public void setListener(IImsMmTelListener l) throws RemoteException {
+            synchronized (mLock) {
+                MmTelFeature.this.setListener(l);
+            }
+        }
+
+        @Override
+        public int getFeatureState() throws RemoteException {
+            synchronized (mLock) {
+                return MmTelFeature.this.getFeatureState();
+            }
+        }
+
+
+        @Override
+        public ImsCallProfile createCallProfile(int callSessionType, int callType)
+                throws RemoteException {
+            synchronized (mLock) {
+                return MmTelFeature.this.createCallProfile(callSessionType,  callType);
+            }
+        }
+
+        @Override
+        public IImsCallSession createCallSession(ImsCallProfile profile,
+                IImsCallSessionListener listener) throws RemoteException {
+            synchronized (mLock) {
+                ImsCallSession s = MmTelFeature.this.createCallSession(profile,
+                        new ImsCallSessionListener(listener));
+                return s != null ? s.getSession() : null;
+            }
+        }
+
+        @Override
+        public IImsUt getUtInterface() throws RemoteException {
+            synchronized (mLock) {
+                return MmTelFeature.this.getUt();
+            }
+        }
+
+        @Override
+        public IImsEcbm getEcbmInterface() throws RemoteException {
+            synchronized (mLock) {
+                return MmTelFeature.this.getEcbm();
+            }
+        }
+
+        @Override
+        public void setUiTtyMode(int uiTtyMode, Message onCompleteMessage) throws RemoteException {
+            synchronized (mLock) {
+                MmTelFeature.this.setUiTtyMode(uiTtyMode, onCompleteMessage);
+            }
+        }
+
+        @Override
+        public IImsMultiEndpoint getMultiEndpointInterface() throws RemoteException {
+            synchronized (mLock) {
+                return MmTelFeature.this.getMultiEndpoint();
+            }
+        }
+
+        @Override
+        public int queryCapabilityStatus() throws RemoteException {
+            return MmTelFeature.this.queryCapabilityStatus().mCapabilities;
+        }
+
+        @Override
+        public void addCapabilityCallback(IImsCapabilityCallback c) {
+            MmTelFeature.this.addCapabilityCallback(c);
+        }
+
+        @Override
+        public void removeCapabilityCallback(IImsCapabilityCallback c) {
+            MmTelFeature.this.removeCapabilityCallback(c);
+        }
+
+        @Override
+        public void changeCapabilitiesConfiguration(CapabilityChangeRequest request,
+                IImsCapabilityCallback c) throws RemoteException {
+            MmTelFeature.this.requestChangeEnabledCapabilities(request, c);
+        }
+
+        @Override
+        public void queryCapabilityConfiguration(int capability, int radioTech,
+                IImsCapabilityCallback c) {
+            queryCapabilityConfigurationInternal(capability, radioTech, c);
+        }
+    };
+
+    /**
+     * Contains the capabilities defined and supported by a MmTelFeature in the form of a Bitmask.
+     * The capabilities that are used in MmTelFeature are defined by {@link MmTelCapability}.
+     *
+     * The capabilities of this MmTelFeature will be set by the framework and can be queried with
+     * {@link #queryCapabilityStatus()}.
+     *
+     * This MmTelFeature can then return the status of each of these capabilities (enabled or not)
+     * by sending a {@link #notifyCapabilitiesStatusChanged} callback to the framework. The current
+     * status can also be queried using {@link #queryCapabilityStatus()}.
+     */
+    public static class MmTelCapabilities extends Capabilities {
+
+        @VisibleForTesting
+        public MmTelCapabilities() {
+            super();
+        }
+
+        public MmTelCapabilities(Capabilities c) {
+            mCapabilities = c.mCapabilities;
+        }
+
+        @IntDef(flag = true,
+                value = {
+                        CAPABILITY_TYPE_VOICE,
+                        CAPABILITY_TYPE_VIDEO,
+                        CAPABILITY_TYPE_UT
+                })
+        @Retention(RetentionPolicy.SOURCE)
+        public @interface MmTelCapability {}
+
+        /**
+         * This MmTelFeature supports Voice calling (IR.92)
+         */
+        public static final int CAPABILITY_TYPE_VOICE = 1 << 0;
+
+        /**
+         * This MmTelFeature supports Video (IR.94)
+         */
+        public static final int CAPABILITY_TYPE_VIDEO = 1 << 1;
+
+        /**
+         * This MmTelFeature supports XCAP over Ut for supplementary services. (IR.92)
+         */
+        public static final int CAPABILITY_TYPE_UT = 1 << 2;
+
+        @Override
+        public final void addCapabilities(@MmTelCapability int capabilities) {
+            super.addCapabilities(capabilities);
+        }
+
+        @Override
+        public final void removeCapabilities(@MmTelCapability int capability) {
+            super.removeCapabilities(capability);
+        }
+
+        @Override
+        public final boolean isCapable(@MmTelCapability int capabilities) {
+            return super.isCapable(capabilities);
+        }
+    }
+
+    /**
+     * Listener that the framework implements for communication from the MmTelFeature.
+     */
+    public static class Listener extends IImsMmTelListener.Stub {
+
+        @Override
+        public final void onIncomingCall(IImsCallSession c) {
+            onIncomingCall(new ImsCallSession(c));
+        }
+
+        /**
+         * Called when the IMS provider receives an incoming call.
+         * @param c The {@link ImsCallSession} associated with the new call.
+         */
+        public void onIncomingCall(ImsCallSession c) {
+        }
+    }
+
+    // Lock for feature synchronization
+    private final Object mLock = new Object();
+    private IImsMmTelListener mListener;
+
+    /**
+     * @param listener A {@link Listener} used when the MmTelFeature receives an incoming call and
+     *     notifies the framework.
+     */
+    private void setListener(IImsMmTelListener listener) {
+        synchronized (mLock) {
+            mListener = listener;
+        }
+    }
+
+    private void queryCapabilityConfigurationInternal(int capability, int radioTech,
+            IImsCapabilityCallback c) {
+        boolean enabled = queryCapabilityConfiguration(capability, radioTech);
+        try {
+            if (c != null) {
+                c.onQueryCapabilityConfiguration(capability, radioTech, enabled);
+            }
+        } catch (RemoteException e) {
+            Log.e(LOG_TAG, "queryCapabilityConfigurationInternal called on dead binder!");
+        }
+    }
+
+    /**
+     * The current capability status that this MmTelFeature has defined is available. This
+     * configuration will be used by the platform to figure out which capabilities are CURRENTLY
+     * available to be used.
+     *
+     * Should be a subset of the capabilities that are enabled by the framework in
+     * {@link #changeEnabledCapabilities}.
+     * @return A copy of the current MmTelFeature capability status.
+     */
+    @Override
+    public final MmTelCapabilities queryCapabilityStatus() {
+        return new MmTelCapabilities(super.queryCapabilityStatus());
+    }
+
+    /**
+     * Notify the framework that the status of the Capabilities has changed. Even though the
+     * MmTelFeature capability may be enabled by the framework, the status may be disabled due to
+     * the feature being unavailable from the network.
+     * @param c The current capability status of the MmTelFeature. If a capability is disabled, then
+     * the status of that capability is disabled. This can happen if the network does not currently
+     * support the capability that is enabled. A capability that is disabled by the framework (via
+     * {@link #changeEnabledCapabilities}) should also show the status as disabled.
+     */
+    protected final void notifyCapabilitiesStatusChanged(MmTelCapabilities c) {
+        super.notifyCapabilitiesStatusChanged(c);
+    }
+
+    /**
+     * Notify the framework of an incoming call.
+     * @param c The {@link ImsCallSession} of the new incoming call.
+     *
+     * @throws RemoteException if the connection to the framework is not available. If this happens,
+     *     the call should be no longer considered active and should be cleaned up.
+     * */
+    protected final void notifyIncomingCall(ImsCallSession c) throws RemoteException {
+        synchronized (mLock) {
+            if (mListener == null) {
+                throw new IllegalStateException("Session is not available.");
+            }
+            mListener.onIncomingCall(c.getSession());
+        }
+    }
+
+    /**
+     * Provides the MmTelFeature with the ability to return the framework Capability Configuration
+     * for a provided Capability. If the framework calls {@link #changeEnabledCapabilities} and
+     * includes a capability A to enable or disable, this method should return the correct enabled
+     * status for capability A.
+     * @param capability The capability that we are querying the configuration for.
+     * @return true if the capability is enabled, false otherwise.
+     */
+    public boolean queryCapabilityConfiguration(@MmTelCapabilities.MmTelCapability int capability,
+            @ImsRegistrationImplBase.ImsRegistrationTech int radioTech) {
+        // Base implementation - Override to provide functionality
+        return false;
+    }
+
+    /**
+     * The MmTelFeature should override this method to handle the enabling/disabling of
+     * MmTel Features, defined in {@link MmTelCapabilities.MmTelCapability}. The framework assumes
+     * the {@link CapabilityChangeRequest} was processed successfully. If a subset of capabilities
+     * could not be set to their new values,
+     * {@link CapabilityCallbackProxy#onChangeCapabilityConfigurationError} must be called
+     * individually for each capability whose processing resulted in an error.
+     *
+     * Enabling/Disabling a capability here indicates that the capability should be registered or
+     * deregistered (depending on the capability change) and become available or unavailable to
+     * the framework.
+     */
+    @Override
+    public void changeEnabledCapabilities(CapabilityChangeRequest request,
+            CapabilityCallbackProxy c) {
+        // Base implementation, no-op
+    }
+
+    /**
+     * Creates a {@link ImsCallProfile} from the service capabilities & IMS registration state.
+     *
+     * @param callSessionType a service type that is specified in {@link ImsCallProfile}
+     *        {@link ImsCallProfile#SERVICE_TYPE_NONE}
+     *        {@link ImsCallProfile#SERVICE_TYPE_NORMAL}
+     *        {@link ImsCallProfile#SERVICE_TYPE_EMERGENCY}
+     * @param callType a call type that is specified in {@link ImsCallProfile}
+     *        {@link ImsCallProfile#CALL_TYPE_VOICE}
+     *        {@link ImsCallProfile#CALL_TYPE_VT}
+     *        {@link ImsCallProfile#CALL_TYPE_VT_TX}
+     *        {@link ImsCallProfile#CALL_TYPE_VT_RX}
+     *        {@link ImsCallProfile#CALL_TYPE_VT_NODIR}
+     *        {@link ImsCallProfile#CALL_TYPE_VS}
+     *        {@link ImsCallProfile#CALL_TYPE_VS_TX}
+     *        {@link ImsCallProfile#CALL_TYPE_VS_RX}
+     * @return a {@link ImsCallProfile} object
+     */
+    public ImsCallProfile createCallProfile(int callSessionType, int callType) {
+        // Base Implementation - Should be overridden
+        return null;
+    }
+
+    /**
+     * Creates an {@link ImsCallSession} with the specified call profile.
+     * Use other methods, if applicable, instead of interacting with
+     * {@link ImsCallSession} directly.
+     *
+     * @param profile a call profile to make the call
+     * @param listener An implementation of IImsCallSessionListener.
+     */
+    public ImsCallSession createCallSession(ImsCallProfile profile,
+            ImsCallSessionListener listener) {
+        // Base Implementation - Should be overridden
+        return null;
+    }
+
+    /**
+     * @return The Ut interface for the supplementary service configuration.
+     */
+    public ImsUtImplBase getUt() {
+        // Base Implementation - Should be overridden
+        return null;
+    }
+
+    /**
+     * @return The Emergency call-back mode interface for emergency VoLTE calls that support it.
+     */
+    public ImsEcbmImplBase getEcbm() {
+        // Base Implementation - Should be overridden
+        return null;
+    }
+
+    /**
+     * @return The Emergency call-back mode interface for emergency VoLTE calls that support it.
+     */
+    public ImsMultiEndpointImplBase getMultiEndpoint() {
+        // Base Implementation - Should be overridden
+        return null;
+    }
+
+    /**
+     * Sets the current UI TTY mode for the MmTelFeature.
+     * @param mode An integer containing the new UI TTY Mode, can consist of
+     *         {@link TelecomManager#TTY_MODE_OFF},
+     *         {@link TelecomManager#TTY_MODE_FULL},
+     *         {@link TelecomManager#TTY_MODE_HCO},
+     *         {@link TelecomManager#TTY_MODE_VCO}
+     * @param onCompleteMessage A {@link Message} to be used when the mode has been set.
+     */
+    void setUiTtyMode(int mode, Message onCompleteMessage) {
+        // Base Implementation - Should be overridden
+    }
+
+    /**{@inheritDoc}*/
+    @Override
+    public void onFeatureRemoved() {
+        // Base Implementation - Should be overridden
+    }
+
+    /**{@inheritDoc}*/
+    @Override
+    public void onFeatureReady() {
+        // Base Implementation - Should be overridden
+    }
+
+    /**
+     * @hide
+     */
+    @Override
+    public final IImsMmTelFeature getBinder() {
+        return mImsMMTelBinder;
+    }
+}
diff --git a/telephony/java/android/telephony/ims/internal/feature/RcsFeature.java b/telephony/java/android/telephony/ims/internal/feature/RcsFeature.java
new file mode 100644
index 0000000..8d1bd9d
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/feature/RcsFeature.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package android.telephony.ims.internal.feature;
+
+import android.telephony.ims.internal.aidl.IImsRcsFeature;
+
+/**
+ * Base implementation of the RcsFeature APIs. Any ImsService wishing to support RCS should extend
+ * this class and provide implementations of the RcsFeature methods that they support.
+ * @hide
+ */
+
+public class RcsFeature extends ImsFeature {
+
+    private final IImsRcsFeature mImsRcsBinder = new IImsRcsFeature.Stub() {
+        // Empty Default Implementation.
+    };
+
+
+    public RcsFeature() {
+        super();
+    }
+
+    @Override
+    public void changeEnabledCapabilities(CapabilityChangeRequest request,
+            CapabilityCallbackProxy c) {
+        // Do nothing for base implementation.
+    }
+
+    @Override
+    public void onFeatureRemoved() {
+
+    }
+
+    /**{@inheritDoc}*/
+    @Override
+    public void onFeatureReady() {
+
+    }
+
+    @Override
+    public final IImsRcsFeature getBinder() {
+        return mImsRcsBinder;
+    }
+}
diff --git a/telephony/java/android/telephony/ims/internal/stub/ImsConfigImplBase.java b/telephony/java/android/telephony/ims/internal/stub/ImsConfigImplBase.java
new file mode 100644
index 0000000..33aec5d
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/stub/ImsConfigImplBase.java
@@ -0,0 +1,173 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package android.telephony.ims.internal.stub;
+
+import android.os.RemoteCallbackList;
+import android.os.RemoteException;
+import android.telephony.ims.internal.aidl.IImsConfig;
+import android.telephony.ims.internal.aidl.IImsConfigCallback;
+
+import com.android.ims.ImsConfig;
+
+/**
+ * Controls the modification of IMS specific configurations. For more information on the supported
+ * IMS configuration constants, see {@link ImsConfig}.
+ *
+ * @hide
+ */
+
+public class ImsConfigImplBase {
+
+    //TODO: Implement the Binder logic to call base APIs. Need to finish other ImsService Config
+    // work first.
+    private final IImsConfig mBinder = new IImsConfig.Stub() {
+
+        @Override
+        public void addImsConfigCallback(IImsConfigCallback c) throws RemoteException {
+            ImsConfigImplBase.this.addImsConfigCallback(c);
+        }
+
+        @Override
+        public void removeImsConfigCallback(IImsConfigCallback c) throws RemoteException {
+            ImsConfigImplBase.this.removeImsConfigCallback(c);
+        }
+
+        @Override
+        public int getConfigInt(int item) throws RemoteException {
+            return Integer.MIN_VALUE;
+        }
+
+        @Override
+        public String getConfigString(int item) throws RemoteException {
+            return null;
+        }
+
+        @Override
+        public int setConfigInt(int item, int value) throws RemoteException {
+            return Integer.MIN_VALUE;
+        }
+
+        @Override
+        public int setConfigString(int item, String value) throws RemoteException {
+            return Integer.MIN_VALUE;
+        }
+    };
+
+    public class Callback extends IImsConfigCallback.Stub {
+
+        @Override
+        public final void onIntConfigChanged(int item, int value) throws RemoteException {
+            onConfigChanged(item, value);
+        }
+
+        @Override
+        public final void onStringConfigChanged(int item, String value) throws RemoteException {
+            onConfigChanged(item, value);
+        }
+
+        /**
+         * Called when the IMS configuration has changed.
+         * @param item the IMS configuration key constant, as defined in ImsConfig.
+         * @param value the new integer value of the IMS configuration constant.
+         */
+        public void onConfigChanged(int item, int value) {
+            // Base Implementation
+        }
+
+        /**
+         * Called when the IMS configuration has changed.
+         * @param item the IMS configuration key constant, as defined in ImsConfig.
+         * @param value the new String value of the IMS configuration constant.
+         */
+        public void onConfigChanged(int item, String value) {
+            // Base Implementation
+        }
+    }
+
+    private final RemoteCallbackList<IImsConfigCallback> mCallbacks = new RemoteCallbackList<>();
+
+    /**
+     * Adds a {@link Callback} to the list of callbacks notified when a value in the configuration
+     * changes.
+     * @param c callback to add.
+     */
+    private void addImsConfigCallback(IImsConfigCallback c) {
+        mCallbacks.register(c);
+    }
+    /**
+     * Removes a {@link Callback} to the list of callbacks notified when a value in the
+     * configuration changes.
+     *
+     * @param c callback to remove.
+     */
+    private void removeImsConfigCallback(IImsConfigCallback c) {
+        mCallbacks.unregister(c);
+    }
+
+    public final IImsConfig getBinder() {
+        return mBinder;
+    }
+
+    /**
+     * Sets the value for IMS service/capabilities parameters by the operator device
+     * management entity. It sets the config item value in the provisioned storage
+     * from which the master value is derived.
+     *
+     * @param item as defined in com.android.ims.ImsConfig#ConfigConstants.
+     * @param value in Integer format.
+     * @return as defined in com.android.ims.ImsConfig#OperationStatusConstants.
+     */
+    public int setConfig(int item, int value) {
+        // Base Implementation - To be overridden.
+        return ImsConfig.OperationStatusConstants.FAILED;
+    }
+
+    /**
+     * Sets the value for IMS service/capabilities parameters by the operator device
+     * management entity. It sets the config item value in the provisioned storage
+     * from which the master value is derived.
+     *
+     * @param item as defined in com.android.ims.ImsConfig#ConfigConstants.
+     * @param value in String format.
+     * @return as defined in com.android.ims.ImsConfig#OperationStatusConstants.
+     */
+    public int setConfig(int item, String value) {
+        return ImsConfig.OperationStatusConstants.FAILED;
+    }
+
+    /**
+     * Gets the value for ims service/capabilities parameters from the provisioned
+     * value storage.
+     *
+     * @param item as defined in com.android.ims.ImsConfig#ConfigConstants.
+     * @return value in Integer format.
+     */
+    public int getConfigInt(int item) {
+        return ImsConfig.OperationStatusConstants.FAILED;
+    }
+
+    /**
+     * Gets the value for ims service/capabilities parameters from the provisioned
+     * value storage.
+     *
+     * @param item as defined in com.android.ims.ImsConfig#ConfigConstants.
+     * @return value in String format.
+     */
+    public String getConfigString(int item) {
+        return null;
+    }
+}
diff --git a/telephony/java/android/telephony/ims/internal/stub/ImsFeatureConfiguration.aidl b/telephony/java/android/telephony/ims/internal/stub/ImsFeatureConfiguration.aidl
new file mode 100644
index 0000000..e890cf8
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/stub/ImsFeatureConfiguration.aidl
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package android.telephony.ims.internal.stub;
+
+parcelable ImsFeatureConfiguration;
diff --git a/telephony/java/android/telephony/ims/internal/stub/ImsFeatureConfiguration.java b/telephony/java/android/telephony/ims/internal/stub/ImsFeatureConfiguration.java
new file mode 100644
index 0000000..244c957
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/stub/ImsFeatureConfiguration.java
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package android.telephony.ims.internal.stub;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.telephony.ims.internal.feature.ImsFeature;
+import android.util.ArraySet;
+
+import java.util.Arrays;
+import java.util.Set;
+
+/**
+ * Container class for IMS Feature configuration. This class contains the features that the
+ * ImsService supports, which are defined in {@link ImsFeature.FeatureType}.
+ * @hide
+ */
+public class ImsFeatureConfiguration implements Parcelable {
+    /**
+     * Features that this ImsService supports.
+     */
+    private final Set<Integer> mFeatures;
+
+    /**
+     * Creates an ImsFeatureConfiguration with the features
+     */
+    public static class Builder {
+            ImsFeatureConfiguration mConfig;
+        public Builder() {
+            mConfig = new ImsFeatureConfiguration();
+        }
+
+        /**
+         * @param feature A feature defined in {@link ImsFeature.FeatureType} that this service
+         *         supports.
+         * @return a {@link Builder} to continue constructing the ImsFeatureConfiguration.
+         */
+        public Builder addFeature(@ImsFeature.FeatureType int feature) {
+            mConfig.addFeature(feature);
+            return this;
+        }
+
+        public ImsFeatureConfiguration build() {
+            return mConfig;
+        }
+    }
+
+    /**
+     * Creates with all registration features empty.
+     *
+     * Consider using the provided {@link Builder} to create this configuration instead.
+     */
+    public ImsFeatureConfiguration() {
+        mFeatures = new ArraySet<>();
+    }
+
+    /**
+     * Configuration of the ImsService, which describes which features the ImsService supports
+     * (for registration).
+     * @param features an array of feature integers defined in {@link ImsFeature} that describe
+     * which features this ImsService supports.
+     */
+    public ImsFeatureConfiguration(int[] features) {
+        mFeatures = new ArraySet<>();
+
+        if (features != null) {
+            for (int i : features) {
+                mFeatures.add(i);
+            }
+        }
+    }
+
+    /**
+     * @return an int[] containing the features that this ImsService supports.
+     */
+    public int[] getServiceFeatures() {
+        return mFeatures.stream().mapToInt(i->i).toArray();
+    }
+
+    void addFeature(int feature) {
+        mFeatures.add(feature);
+    }
+
+    protected ImsFeatureConfiguration(Parcel in) {
+        int[] features = in.createIntArray();
+        if (features != null) {
+            mFeatures = new ArraySet<>(features.length);
+            for(Integer i : features) {
+                mFeatures.add(i);
+            }
+        } else {
+            mFeatures = new ArraySet<>();
+        }
+    }
+
+    public static final Creator<ImsFeatureConfiguration> CREATOR
+            = new Creator<ImsFeatureConfiguration>() {
+        @Override
+        public ImsFeatureConfiguration createFromParcel(Parcel in) {
+            return new ImsFeatureConfiguration(in);
+        }
+
+        @Override
+        public ImsFeatureConfiguration[] newArray(int size) {
+            return new ImsFeatureConfiguration[size];
+        }
+    };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeIntArray(mFeatures.stream().mapToInt(i->i).toArray());
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof ImsFeatureConfiguration)) return false;
+
+        ImsFeatureConfiguration that = (ImsFeatureConfiguration) o;
+
+        return mFeatures.equals(that.mFeatures);
+    }
+
+    @Override
+    public int hashCode() {
+        return mFeatures.hashCode();
+    }
+}
diff --git a/telephony/java/android/telephony/ims/internal/stub/ImsRegistrationImplBase.java b/telephony/java/android/telephony/ims/internal/stub/ImsRegistrationImplBase.java
new file mode 100644
index 0000000..558b009
--- /dev/null
+++ b/telephony/java/android/telephony/ims/internal/stub/ImsRegistrationImplBase.java
@@ -0,0 +1,276 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package android.telephony.ims.internal.stub;
+
+import android.annotation.IntDef;
+import android.os.RemoteCallbackList;
+import android.os.RemoteException;
+import android.telephony.ims.internal.aidl.IImsRegistration;
+import android.telephony.ims.internal.aidl.IImsRegistrationCallback;
+import android.util.Log;
+
+import com.android.ims.ImsReasonInfo;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Controls IMS registration for this ImsService and notifies the framework when the IMS
+ * registration for this ImsService has changed status.
+ * @hide
+ */
+
+public class ImsRegistrationImplBase {
+
+    private static final String LOG_TAG = "ImsRegistrationImplBase";
+
+    // Defines the underlying radio technology type that we have registered for IMS over.
+    @IntDef(flag = true,
+            value = {
+                    REGISTRATION_TECH_NONE,
+                    REGISTRATION_TECH_LTE,
+                    REGISTRATION_TECH_IWLAN
+            })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface ImsRegistrationTech {}
+    /**
+     * No registration technology specified, used when we are not registered.
+     */
+    public static final int REGISTRATION_TECH_NONE = -1;
+    /**
+     * IMS is registered to IMS via LTE.
+     */
+    public static final int REGISTRATION_TECH_LTE = 0;
+    /**
+     * IMS is registered to IMS via IWLAN.
+     */
+    public static final int REGISTRATION_TECH_IWLAN = 1;
+
+    // Registration states, used to notify new ImsRegistrationImplBase#Callbacks of the current
+    // state.
+    private static final int REGISTRATION_STATE_NOT_REGISTERED = 0;
+    private static final int REGISTRATION_STATE_REGISTERING = 1;
+    private static final int REGISTRATION_STATE_REGISTERED = 2;
+
+
+    /**
+     * Callback class for receiving Registration callback events.
+     */
+    public static class Callback extends IImsRegistrationCallback.Stub {
+
+        /**
+         * Notifies the framework when the IMS Provider is connected to the IMS network.
+         *
+         * @param imsRadioTech the radio access technology. Valid values are defined in
+         * {@link ImsRegistrationTech}.
+         */
+        @Override
+        public void onRegistered(@ImsRegistrationTech int imsRadioTech) {
+        }
+
+        /**
+         * Notifies the framework when the IMS Provider is trying to connect the IMS network.
+         *
+         * @param imsRadioTech the radio access technology. Valid values are defined in
+         * {@link ImsRegistrationTech}.
+         */
+        @Override
+        public void onRegistering(@ImsRegistrationTech int imsRadioTech) {
+        }
+
+        /**
+         * Notifies the framework when the IMS Provider is disconnected from the IMS network.
+         *
+         * @param info the {@link ImsReasonInfo} associated with why registration was disconnected.
+         */
+        @Override
+        public void onDeregistered(ImsReasonInfo info) {
+        }
+
+        /**
+         * A failure has occurred when trying to handover registration to another technology type,
+         * defined in {@link ImsRegistrationTech}
+         *
+         * @param imsRadioTech The {@link ImsRegistrationTech} type that has failed
+         * @param info A {@link ImsReasonInfo} that identifies the reason for failure.
+         */
+        @Override
+        public void onTechnologyChangeFailed(@ImsRegistrationTech int imsRadioTech,
+                ImsReasonInfo info) {
+        }
+    }
+
+    private final IImsRegistration mBinder = new IImsRegistration.Stub() {
+
+        @Override
+        public @ImsRegistrationTech int getRegistrationTechnology() throws RemoteException {
+            return getConnectionType();
+        }
+
+        @Override
+        public void addRegistrationCallback(IImsRegistrationCallback c) throws RemoteException {
+            ImsRegistrationImplBase.this.addRegistrationCallback(c);
+        }
+
+        @Override
+        public void removeRegistrationCallback(IImsRegistrationCallback c) throws RemoteException {
+            ImsRegistrationImplBase.this.removeRegistrationCallback(c);
+        }
+    };
+
+    private final RemoteCallbackList<IImsRegistrationCallback> mCallbacks
+            = new RemoteCallbackList<>();
+    private final Object mLock = new Object();
+    // Locked on mLock
+    private @ImsRegistrationTech
+    int mConnectionType = REGISTRATION_TECH_NONE;
+    // Locked on mLock
+    private int mRegistrationState = REGISTRATION_STATE_NOT_REGISTERED;
+    // Locked on mLock
+    private ImsReasonInfo mLastDisconnectCause;
+
+    public final IImsRegistration getBinder() {
+        return mBinder;
+    }
+
+    private void addRegistrationCallback(IImsRegistrationCallback c) throws RemoteException {
+        mCallbacks.register(c);
+        updateNewCallbackWithState(c);
+    }
+
+    private void removeRegistrationCallback(IImsRegistrationCallback c) {
+        mCallbacks.unregister(c);
+    }
+
+    /**
+     * Notify the framework that the device is connected to the IMS network.
+     *
+     * @param imsRadioTech the radio access technology. Valid values are defined in
+     * {@link ImsRegistrationTech}.
+     */
+    public final void onRegistered(@ImsRegistrationTech int imsRadioTech) {
+        updateToState(imsRadioTech, REGISTRATION_STATE_REGISTERED);
+        mCallbacks.broadcast((c) -> {
+            try {
+                c.onRegistered(imsRadioTech);
+            } catch (RemoteException e) {
+                Log.w(LOG_TAG, e + " " + "onRegistrationConnected() - Skipping " +
+                        "callback.");
+            }
+        });
+    }
+
+    /**
+     * Notify the framework that the device is trying to connect the IMS network.
+     *
+     * @param imsRadioTech the radio access technology. Valid values are defined in
+     * {@link ImsRegistrationTech}.
+     */
+    public final void onRegistering(@ImsRegistrationTech int imsRadioTech) {
+        updateToState(imsRadioTech, REGISTRATION_STATE_REGISTERING);
+        mCallbacks.broadcast((c) -> {
+            try {
+                c.onRegistering(imsRadioTech);
+            } catch (RemoteException e) {
+                Log.w(LOG_TAG, e + " " + "onRegistrationProcessing() - Skipping " +
+                        "callback.");
+            }
+        });
+    }
+
+    /**
+     * Notify the framework that the device is disconnected from the IMS network.
+     *
+     * @param info the {@link ImsReasonInfo} associated with why registration was disconnected.
+     */
+    public final void onDeregistered(ImsReasonInfo info) {
+        updateToDisconnectedState(info);
+        mCallbacks.broadcast((c) -> {
+            try {
+                c.onDeregistered(info);
+            } catch (RemoteException e) {
+                Log.w(LOG_TAG, e + " " + "onRegistrationDisconnected() - Skipping " +
+                        "callback.");
+            }
+        });
+    }
+
+    public final void onTechnologyChangeFailed(@ImsRegistrationTech int imsRadioTech,
+            ImsReasonInfo info) {
+        mCallbacks.broadcast((c) -> {
+            try {
+                c.onTechnologyChangeFailed(imsRadioTech, info);
+            } catch (RemoteException e) {
+                Log.w(LOG_TAG, e + " " + "onRegistrationChangeFailed() - Skipping " +
+                        "callback.");
+            }
+        });
+    }
+
+    private void updateToState(@ImsRegistrationTech int connType, int newState) {
+        synchronized (mLock) {
+            mConnectionType = connType;
+            mRegistrationState = newState;
+            mLastDisconnectCause = null;
+        }
+    }
+
+    private void updateToDisconnectedState(ImsReasonInfo info) {
+        synchronized (mLock) {
+            updateToState(REGISTRATION_TECH_NONE, REGISTRATION_STATE_NOT_REGISTERED);
+            if (info != null) {
+                mLastDisconnectCause = info;
+            } else {
+                Log.w(LOG_TAG, "updateToDisconnectedState: no ImsReasonInfo provided.");
+                mLastDisconnectCause = new ImsReasonInfo();
+            }
+        }
+    }
+
+    private @ImsRegistrationTech int getConnectionType() {
+        synchronized (mLock) {
+            return mConnectionType;
+        }
+    }
+
+    /**
+     * @param c the newly registered callback that will be updated with the current registration
+     *         state.
+     */
+    private void updateNewCallbackWithState(IImsRegistrationCallback c) throws RemoteException {
+        int state;
+        ImsReasonInfo disconnectInfo;
+        synchronized (mLock) {
+            state = mRegistrationState;
+            disconnectInfo = mLastDisconnectCause;
+        }
+        switch (state) {
+            case REGISTRATION_STATE_NOT_REGISTERED: {
+                c.onDeregistered(disconnectInfo);
+                break;
+            }
+            case REGISTRATION_STATE_REGISTERING: {
+                c.onRegistering(getConnectionType());
+                break;
+            }
+            case REGISTRATION_STATE_REGISTERED: {
+                c.onRegistered(getConnectionType());
+                break;
+            }
+        }
+    }
+}