diff --git a/src/com/android/phone/CallFeaturesSetting.java b/src/com/android/phone/CallFeaturesSetting.java
index 7bff98a..fdd610e 100644
--- a/src/com/android/phone/CallFeaturesSetting.java
+++ b/src/com/android/phone/CallFeaturesSetting.java
@@ -456,11 +456,7 @@
                     CarrierConfigManager.KEY_USE_WFC_HOME_NETWORK_MODE_IN_ROAMING_NETWORK_BOOL,
                     false);
         boolean isDataEnabled;
-        if (mPhone.isUsingNewDataStack()) {
-            isDataEnabled = mPhone.getDataSettingsManager().isDataEnabled();
-        } else {
-            isDataEnabled = mPhone.getDataEnabledSettings().isDataEnabled();
-        }
+        isDataEnabled = mPhone.getDataSettingsManager().isDataEnabled();
         if (mImsMgr.isVtEnabledByPlatform() && mImsMgr.isVtProvisionedOnDevice()
                 && (carrierConfig.getBoolean(
                         CarrierConfigManager.KEY_IGNORE_DATA_ENABLED_CHANGED_FOR_VIDEO_CALLS)
diff --git a/src/com/android/phone/PhoneGlobals.java b/src/com/android/phone/PhoneGlobals.java
index f6ec75d..abbd816 100644
--- a/src/com/android/phone/PhoneGlobals.java
+++ b/src/com/android/phone/PhoneGlobals.java
@@ -49,7 +49,6 @@
 import android.telephony.TelephonyCallback;
 import android.telephony.TelephonyLocalConnection;
 import android.telephony.TelephonyManager;
-import android.telephony.data.ApnSetting;
 import android.util.LocalLog;
 import android.util.Log;
 import android.widget.Toast;
@@ -68,8 +67,6 @@
 import com.android.internal.telephony.TelephonyComponentFactory;
 import com.android.internal.telephony.TelephonyIntents;
 import com.android.internal.telephony.data.DataEvaluation.DataDisallowedReason;
-import com.android.internal.telephony.dataconnection.DataConnectionReasons;
-import com.android.internal.telephony.dataconnection.DataConnectionReasons.DataDisallowedReasonType;
 import com.android.internal.telephony.ims.ImsResolver;
 import com.android.internal.telephony.imsphone.ImsPhone;
 import com.android.internal.telephony.imsphone.ImsPhoneCallTracker;
@@ -891,22 +888,13 @@
 
         boolean dataAllowed;
         boolean notAllowedDueToRoamingOff;
-        if (phone.isUsingNewDataStack()) {
-            List<DataDisallowedReason> reasons = phone.getDataNetworkController()
-                    .getInternetDataDisallowedReasons();
-            dataAllowed = reasons.isEmpty();
-            notAllowedDueToRoamingOff = (reasons.size() == 1
-                    && reasons.contains(DataDisallowedReason.ROAMING_DISABLED));
-            mDataRoamingNotifLog.log("dataAllowed=" + dataAllowed + ", reasons=" + reasons);
-            if (VDBG) Log.v(LOG_TAG, "dataAllowed=" + dataAllowed + ", reasons=" + reasons);
-        } else {
-            DataConnectionReasons reasons = new DataConnectionReasons();
-            dataAllowed = phone.isDataAllowed(ApnSetting.TYPE_DEFAULT, reasons);
-            notAllowedDueToRoamingOff = reasons.containsOnly(
-                    DataDisallowedReasonType.ROAMING_DISABLED);
-            mDataRoamingNotifLog.log("dataAllowed=" + dataAllowed + ", reasons=" + reasons);
-            if (VDBG) Log.v(LOG_TAG, "dataAllowed=" + dataAllowed + ", reasons=" + reasons);
-        }
+        List<DataDisallowedReason> reasons = phone.getDataNetworkController()
+                .getInternetDataDisallowedReasons();
+        dataAllowed = reasons.isEmpty();
+        notAllowedDueToRoamingOff = (reasons.size() == 1
+                && reasons.contains(DataDisallowedReason.ROAMING_DISABLED));
+        mDataRoamingNotifLog.log("dataAllowed=" + dataAllowed + ", reasons=" + reasons);
+        if (VDBG) Log.v(LOG_TAG, "dataAllowed=" + dataAllowed + ", reasons=" + reasons);
 
         if (!dataAllowed && notAllowedDueToRoamingOff) {
             // No need to show it again if we never cancelled it explicitly.
diff --git a/src/com/android/phone/PhoneInterfaceManager.java b/src/com/android/phone/PhoneInterfaceManager.java
index 5e9c1fd..bdbd5f9 100644
--- a/src/com/android/phone/PhoneInterfaceManager.java
+++ b/src/com/android/phone/PhoneInterfaceManager.java
@@ -184,7 +184,6 @@
 import com.android.internal.telephony.TelephonyIntents;
 import com.android.internal.telephony.TelephonyPermissions;
 import com.android.internal.telephony.data.DataUtils;
-import com.android.internal.telephony.dataconnection.ApnSettingUtils;
 import com.android.internal.telephony.emergency.EmergencyNumberTracker;
 import com.android.internal.telephony.euicc.EuiccConnector;
 import com.android.internal.telephony.ims.ImsResolver;
@@ -2865,13 +2864,8 @@
             int subId = mSubscriptionController.getDefaultDataSubId();
             final Phone phone = getPhone(subId);
             if (phone != null) {
-                if (phone.isUsingNewDataStack()) {
-                    phone.getDataSettingsManager().setDataEnabled(
-                            TelephonyManager.DATA_ENABLED_REASON_USER, true, callingPackage);
-                } else {
-                    phone.getDataEnabledSettings().setDataEnabled(
-                            TelephonyManager.DATA_ENABLED_REASON_USER, true);
-                }
+                phone.getDataSettingsManager().setDataEnabled(
+                        TelephonyManager.DATA_ENABLED_REASON_USER, true, callingPackage);
                 return true;
             } else {
                 return false;
@@ -2891,13 +2885,8 @@
             int subId = mSubscriptionController.getDefaultDataSubId();
             final Phone phone = getPhone(subId);
             if (phone != null) {
-                if (phone.isUsingNewDataStack()) {
-                    phone.getDataSettingsManager().setDataEnabled(
-                            TelephonyManager.DATA_ENABLED_REASON_USER, false, callingPackage);
-                } else {
-                    phone.getDataEnabledSettings().setDataEnabled(
-                            TelephonyManager.DATA_ENABLED_REASON_USER, false);
-                }
+                phone.getDataSettingsManager().setDataEnabled(
+                        TelephonyManager.DATA_ENABLED_REASON_USER, false, callingPackage);
                 return true;
             } else {
                 return false;
@@ -3013,10 +3002,7 @@
         try {
             final Phone phone = getPhone(subId);
             if (phone != null) {
-                if (phone.isUsingNewDataStack()) {
-                    return phone.getDataNetworkController().getInternetDataNetworkState();
-                }
-                return PhoneConstantConversions.convertDataState(phone.getDataConnectionState());
+                return phone.getDataNetworkController().getInternetDataNetworkState();
             } else {
                 return PhoneConstantConversions.convertDataState(
                         PhoneConstants.DataState.DISCONNECTED);
@@ -6663,11 +6649,7 @@
             Phone phone = PhoneFactory.getPhone(phoneId);
             if (phone != null) {
                 boolean retVal;
-                if (phone.isUsingNewDataStack()) {
-                    retVal = phone.getDataSettingsManager().isDataEnabled();
-                } else {
-                    retVal = phone.getDataEnabledSettings().isDataEnabled();
-                }
+                retVal = phone.getDataSettingsManager().isDataEnabled();
                 if (DBG) log("isDataEnabled: " + retVal + ", subId=" + subId);
                 return retVal;
             } else {
@@ -6719,15 +6701,7 @@
             Phone phone = PhoneFactory.getPhone(phoneId);
             if (phone != null) {
                 boolean retVal;
-                if (phone.isUsingNewDataStack()) {
-                    retVal = phone.getDataSettingsManager().isDataEnabledForReason(reason);
-                } else {
-                    if (reason == TelephonyManager.DATA_ENABLED_REASON_USER) {
-                        retVal = phone.isUserDataEnabled();
-                    } else {
-                        retVal = phone.getDataEnabledSettings().isDataEnabledForReason(reason);
-                    }
-                }
+                retVal = phone.getDataSettingsManager().isDataEnabledForReason(reason);
                 if (DBG) log("isDataEnabledForReason: retVal=" + retVal);
                 return retVal;
             } else {
@@ -8465,12 +8439,8 @@
                 if (reason == TelephonyManager.DATA_ENABLED_REASON_CARRIER) {
                     phone.carrierActionSetMeteredApnsEnabled(enabled);
                 } else {
-                    if (phone.isUsingNewDataStack()) {
-                        phone.getDataSettingsManager().setDataEnabled(
-                                reason, enabled, callingPackage);
-                    } else {
-                        phone.getDataEnabledSettings().setDataEnabled(reason, enabled);
-                    }
+                    phone.getDataSettingsManager().setDataEnabled(
+                            reason, enabled, callingPackage);
                 }
             }
         } finally {
@@ -9680,15 +9650,10 @@
 
             boolean isMetered;
             boolean isDataEnabled;
-            if (phone.isUsingNewDataStack()) {
-                isMetered = phone.getDataNetworkController().getDataConfigManager()
-                        .isMeteredCapability(DataUtils.apnTypeToNetworkCapability(apnType),
-                                phone.getServiceState().getDataRoaming());
-                isDataEnabled = phone.getDataSettingsManager().isDataEnabled(apnType);
-            } else {
-                isMetered = ApnSettingUtils.isMeteredApnType(apnType, phone);
-                isDataEnabled = phone.getDataEnabledSettings().isDataEnabled(apnType);
-            }
+            isMetered = phone.getDataNetworkController().getDataConfigManager()
+                    .isMeteredCapability(DataUtils.apnTypeToNetworkCapability(apnType),
+                            phone.getServiceState().getDataRoaming());
+            isDataEnabled = phone.getDataSettingsManager().isDataEnabled(apnType);
             return !isMetered || isDataEnabled;
         } finally {
             Binder.restoreCallingIdentity(identity);
@@ -9704,13 +9669,9 @@
         try {
             Phone phone = getPhone(subId);
             if (phone == null) return true; // By default return true.
-            if (phone.isUsingNewDataStack()) {
-                return phone.getDataNetworkController().getDataConfigManager().isMeteredCapability(
-                        DataUtils.apnTypeToNetworkCapability(apnType),
-                        phone.getServiceState().getDataRoaming());
-            }
-
-            return ApnSettingUtils.isMeteredApnType(apnType, phone);
+            return phone.getDataNetworkController().getDataConfigManager().isMeteredCapability(
+                    DataUtils.apnTypeToNetworkCapability(apnType),
+                    phone.getServiceState().getDataRoaming());
         } finally {
             Binder.restoreCallingIdentity(identity);
         }
@@ -9842,17 +9803,9 @@
 
             switch (policy) {
                 case TelephonyManager.MOBILE_DATA_POLICY_DATA_ON_NON_DEFAULT_DURING_VOICE_CALL:
-                    if (phone.isUsingNewDataStack()) {
-                        return phone.getDataSettingsManager().isDataAllowedInVoiceCall();
-                    } else {
-                        return phone.getDataEnabledSettings().isDataAllowedInVoiceCall();
-                    }
+                    return phone.getDataSettingsManager().isDataAllowedInVoiceCall();
                 case TelephonyManager.MOBILE_DATA_POLICY_MMS_ALWAYS_ALLOWED:
-                    if (phone.isUsingNewDataStack()) {
-                        return phone.getDataSettingsManager().isMmsAlwaysAllowed();
-                    } else {
-                        return phone.getDataEnabledSettings().isMmsAlwaysAllowed();
-                    }
+                    return phone.getDataSettingsManager().isMmsAlwaysAllowed();
                 default:
                     throw new IllegalArgumentException(policy + " is not a valid policy");
             }
@@ -9873,18 +9826,10 @@
 
             switch (policy) {
                 case TelephonyManager.MOBILE_DATA_POLICY_DATA_ON_NON_DEFAULT_DURING_VOICE_CALL:
-                    if (phone.isUsingNewDataStack()) {
-                        phone.getDataSettingsManager().setAllowDataDuringVoiceCall(enabled);
-                    } else {
-                        phone.getDataEnabledSettings().setAllowDataDuringVoiceCall(enabled);
-                    }
+                    phone.getDataSettingsManager().setAllowDataDuringVoiceCall(enabled);
                     break;
                 case TelephonyManager.MOBILE_DATA_POLICY_MMS_ALWAYS_ALLOWED:
-                    if (phone.isUsingNewDataStack()) {
-                        phone.getDataSettingsManager().setAlwaysAllowMmsData(enabled);
-                    } else {
-                        phone.getDataEnabledSettings().setAlwaysAllowMmsData(enabled);
-                    }
+                    phone.getDataSettingsManager().setAlwaysAllowMmsData(enabled);
                     break;
                 default:
                     throw new IllegalArgumentException(policy + " is not a valid policy");
@@ -11261,12 +11206,6 @@
         }
     }
 
-    @Override
-    public boolean isUsingNewDataStack() {
-        TelephonyPermissions.enforceShellOnly(Binder.getCallingUid(), "isUsingNewDataStack");
-        return getDefaultPhone().isUsingNewDataStack();
-    }
-
     /**
      * Sets the modem service class Name that Telephony will bind to.
      *
diff --git a/src/com/android/phone/TelephonyShellCommand.java b/src/com/android/phone/TelephonyShellCommand.java
index b4984ec..3eb4511 100644
--- a/src/com/android/phone/TelephonyShellCommand.java
+++ b/src/com/android/phone/TelephonyShellCommand.java
@@ -172,8 +172,6 @@
             "get-allowed-network-types-for-users";
     private static final String SET_ALLOWED_NETWORK_TYPES_FOR_USER =
             "set-allowed-network-types-for-users";
-    // Check if telephony new data stack is enabled.
-    private static final String GET_DATA_MODE = "get-data-mode";
     private static final String GET_IMEI = "get-imei";
     private static final String GET_SIM_SLOTS_MAPPING = "get-sim-slots-mapping";
     // Take advantage of existing methods that already contain permissions checks when possible.
@@ -329,8 +327,6 @@
             case GET_ALLOWED_NETWORK_TYPES_FOR_USER:
             case SET_ALLOWED_NETWORK_TYPES_FOR_USER:
                 return handleAllowedNetworkTypesCommand(cmd);
-            case GET_DATA_MODE:
-                return handleGetDataMode();
             case GET_IMEI:
                 return handleGetImei();
             case GET_SIM_SLOTS_MAPPING:
@@ -2913,24 +2909,6 @@
         }
     }
 
-    private int handleGetDataMode() {
-        if (!checkShellUid()) {
-            return -1;
-        }
-
-        boolean newDataStackEnabled = false;
-        try {
-            newDataStackEnabled = mInterface.isUsingNewDataStack();
-        } catch (RemoteException e) {
-            getOutPrintWriter().println("Something went wrong. " + e);
-            return -1;
-        }
-
-        getOutPrintWriter().println("Telephony is running with the "
-                + (newDataStackEnabled ? "new" : "old") + " data stack.");
-        return 0;
-    }
-
     private int handleRadioSetModemServiceCommand() {
         PrintWriter errPw = getErrPrintWriter();
         String serviceName = null;