diff --git a/InCallUI/res/layout/call_button_fragment.xml b/InCallUI/res/layout/call_button_fragment.xml
index 69d0ee3..4eac034 100644
--- a/InCallUI/res/layout/call_button_fragment.xml
+++ b/InCallUI/res/layout/call_button_fragment.xml
@@ -68,7 +68,8 @@
         <ToggleButton android:id="@+id/audioButton"
             style="@style/InCallCompoundButton"
             android:background="@drawable/btn_compound_audio"
-            android:contentDescription="@string/audio_mode_speaker" />
+            android:contentDescription="@string/audio_mode_speaker"
+            android:visibility="gone" />
 
         <!-- "Change to audio call" for video calls. -->
         <ImageButton android:id="@+id/changeToVoiceButton"
@@ -83,7 +84,8 @@
         <ToggleButton android:id="@+id/muteButton"
             style="@style/InCallCompoundButton"
             android:background="@drawable/btn_compound_mute"
-            android:contentDescription="@string/onscreenMuteText" />
+            android:contentDescription="@string/onscreenMuteText"
+            android:visibility="gone" />
 
         <!-- CENTER SLOT ======================================================================= -->
 
@@ -91,7 +93,8 @@
         <ToggleButton android:id="@+id/dialpadButton"
             style="@style/InCallCompoundButton"
             android:background="@drawable/btn_compound_dialpad"
-            android:contentDescription="@string/onscreenShowDialpadText" />
+            android:contentDescription="@string/onscreenShowDialpadText"
+            android:visibility="gone" />
 
         <!-- MIDDLE RIGHT SLOT ================================================================= -->
 
@@ -102,7 +105,8 @@
         <ToggleButton android:id="@+id/holdButton"
             style="@style/InCallCompoundButton"
             android:background="@drawable/btn_compound_hold"
-            android:contentDescription="@string/onscreenHoldText" />
+            android:contentDescription="@string/onscreenHoldText_unselected"
+            android:visibility="gone" />
 
         <!-- "Swap" (or "Manage calls" in some CDMA states) -->
         <ImageButton android:id="@+id/swapButton"
diff --git a/InCallUI/res/menu/incall_overflow_menu.xml b/InCallUI/res/menu/incall_overflow_menu.xml
deleted file mode 100644
index 2de8587..0000000
--- a/InCallUI/res/menu/incall_overflow_menu.xml
+++ /dev/null
@@ -1,36 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-  ~ Copyright (C) 2014 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
-  -->
-
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
-    <item android:id="@+id/overflow_merge_menu_item"
-          android:title="@string/overflowMergeMenuItemText" />
-
-    <item android:id="@+id/overflow_add_menu_item"
-          android:title="@string/overflowAddMenuItemText" />
-
-    <item android:id="@+id/overflow_hold_menu_item"
-          android:title="@string/overflowHoldMenuItemText" />
-
-    <item android:id="@+id/overflow_resume_menu_item"
-        android:title="@string/overflowResumeMenuItemText" />
-
-    <item android:id="@+id/overflow_swap_menu_item"
-          android:title="@string/overflowSwapMenuItemText" />
-
-    <item android:id="@+id/overflow_manage_conference_menu_item"
-          android:title="@string/overflowManageConferenceMenuItemText" />
-</menu>
diff --git a/InCallUI/res/values/strings.xml b/InCallUI/res/values/strings.xml
index 99b8111..cfe3d41 100644
--- a/InCallUI/res/values/strings.xml
+++ b/InCallUI/res/values/strings.xml
@@ -255,23 +255,14 @@
          to dial using the physical keyboard -->
     <string name="dialerKeyboardHintText">Use keyboard to dial</string>
 
-    <!-- Text for the overflow "Hold call" menu item. -->
-    <string name="overflowHoldMenuItemText">Hold call</string>
-    <!-- Text for the overflow "Resume call" menu item. -->
-    <string name="overflowResumeMenuItemText">Resume call</string>
-    <!-- Text for the overflow "Add call" menu item. -->
-    <string name="overflowAddMenuItemText">Add call</string>
-    <!-- Text for the onscreen "Merge calls" menu item. -->
-    <string name="overflowMergeMenuItemText">Merge calls</string>
-    <!-- Text for the onscreen "Swap calls" menu item. -->
-    <string name="overflowSwapMenuItemText">Swap calls</string>
-    <!-- Text for the overflow "Manage Conference Video Call" menu item. -->
-    <string name="overflowManageConferenceMenuItemText">Manage Conference</string>
-
-    <!-- Text for the onscreen "Hold" button -->
-    <string name="onscreenHoldText">Hold</string>
+    <!-- Text for the onscreen "Hold" button when it is not selected. Pressing it will put
+         the call on hold. -->
+    <string name="onscreenHoldText_unselected">Hold Call</string>
+    <!-- Text for the onscreen "Hold" button when it is selected. Pressing it will resume
+         the call from a previously held state. -->
+    <string name="onscreenHoldText_selected">Resume Call</string>
     <!-- Text for the onscreen "End call" button -->
-    <string name="onscreenEndCallText">End</string>
+    <string name="onscreenEndCallText">End Call</string>
     <!-- Text for the onscreen "Show Dialpad" button -->
     <string name="onscreenShowDialpadText">Dialpad</string>
     <!-- Text for the onscreen "Mute" button -->
@@ -456,7 +447,7 @@
     <!-- This can be used in any application wanting to disable the text "Emergency number" -->
     <string name="emergency_call_dialog_number_for_display">Emergency number</string>
 
-    <!-- STOPSHIP These strings are for debugging only --> 
+    <!-- STOPSHIP These strings are for debugging only -->
     <!-- Call substate label -->
     <string name="call_substate_label" translatable="false">Call substate - \u000a</string>
     <!-- Call substate label for call resumed -->
diff --git a/InCallUI/src/com/android/incallui/CallButtonFragment.java b/InCallUI/src/com/android/incallui/CallButtonFragment.java
index a6ea334..1e90827 100644
--- a/InCallUI/src/com/android/incallui/CallButtonFragment.java
+++ b/InCallUI/src/com/android/incallui/CallButtonFragment.java
@@ -32,6 +32,7 @@
 import android.telecom.AudioState;
 import android.telecom.TelecomManager;
 import android.telecom.VideoProfile;
+import android.util.SparseIntArray;
 import android.view.ContextThemeWrapper;
 import android.view.HapticFeedbackConstants;
 import android.view.LayoutInflater;
@@ -57,23 +58,31 @@
         implements CallButtonPresenter.CallButtonUi, OnMenuItemClickListener, OnDismissListener,
         View.OnClickListener {
     private static final int INVALID_INDEX = -1;
+    private static final int BUTTON_MAX_VISIBLE = 5;
+    // The button is currently visible in the UI
+    private static final int BUTTON_VISIBLE = 1;
+    // The button is hidden in the UI
+    private static final int BUTTON_HIDDEN = 2;
+    // The button has been collapsed into the overflow menu
+    private static final int BUTTON_MENU = 3;
 
     public interface Buttons {
-        public static final int BUTTON_AUDIO = 1;
-        public static final int BUTTON_DOWNGRADE_TO_VOICE = 2;
-        public static final int BUTTON_MUTE = 3;
-        public static final int BUTTON_DIALPAD = 4;
-        public static final int BUTTON_HOLD = 5;
-        public static final int BUTTON_SWAP = 6;
-        public static final int BUTTON_UPGRADE_TO_VIDEO = 7;
-        public static final int BUTTON_SWITCH_CAMERA = 8;
-        public static final int BUTTON_ADD_CALL = 9;
-        public static final int BUTTON_MERGE = 10;
-        public static final int BUTTON_PAUSE_VIDEO = 11;
-        public static final int BUTTON_MANAGE_VIDEO_CONFERENCE = 12;
-        public static final int BUTTON_OVERFLOW = 13;
+        public static final int BUTTON_AUDIO = 0;
+        public static final int BUTTON_DOWNGRADE_TO_VOICE = 1;
+        public static final int BUTTON_MUTE = 2;
+        public static final int BUTTON_DIALPAD = 3;
+        public static final int BUTTON_HOLD = 4;
+        public static final int BUTTON_SWAP = 5;
+        public static final int BUTTON_UPGRADE_TO_VIDEO = 6;
+        public static final int BUTTON_SWITCH_CAMERA = 7;
+        public static final int BUTTON_ADD_CALL = 8;
+        public static final int BUTTON_MERGE = 9;
+        public static final int BUTTON_PAUSE_VIDEO = 10;
+        public static final int BUTTON_MANAGE_VIDEO_CONFERENCE = 11;
+        public static final int BUTTON_COUNT = 12;
     }
 
+    private SparseIntArray mButtonVisibilityMap = new SparseIntArray(BUTTON_COUNT);
 
     private CompoundButton mAudioButton;
     private ImageButton mChangeToVoiceButton;
@@ -116,6 +125,10 @@
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+
+        for (int i = 0; i < BUTTON_COUNT; i++) {
+            mButtonVisibilityMap.put(i, BUTTON_HIDDEN);
+        }
     }
 
     @Override
@@ -218,7 +231,9 @@
                         !mPauseVideoButton.isSelected() /* pause */);
                 break;
             case R.id.overflowButton:
-                mOverflowPopup.show();
+                if (mOverflowPopup != null) {
+                    mOverflowPopup.show();
+                }
                 break;
             case R.id.manageVideoCallConferenceButton:
                 onManageVideoCallConferenceClicked();
@@ -240,7 +255,6 @@
             return;
         }
 
-        Resources res = getActivity().getResources();
         View[] compoundButtons = {
                 mAudioButton,
                 mMuteButton,
@@ -363,18 +377,8 @@
     }
 
     @Override
-    public void setMute(boolean value) {
-        if (mMuteButton.isSelected() != value) {
-            mMuteButton.setSelected(value);
-        }
-    }
-
-    @Override
     public void showButton(int buttonId, boolean show) {
-        final View button = getButtonById(buttonId);
-        if (button != null) {
-            button.setVisibility(show ? View.VISIBLE : View.GONE);
-        }
+        mButtonVisibilityMap.put(buttonId, show ? BUTTON_VISIBLE : BUTTON_HIDDEN);
     }
 
     @Override
@@ -411,8 +415,6 @@
                 return mPauseVideoButton;
             case BUTTON_MANAGE_VIDEO_CONFERENCE:
                 return mManageVideoCallConferenceButton;
-            case BUTTON_OVERFLOW:
-                return mOverflowButton;
             default:
                 Log.w(this, "Invalid button id");
                 return null;
@@ -423,6 +425,9 @@
     public void setHold(boolean value) {
         if (mHoldButton.isSelected() != value) {
             mHoldButton.setSelected(value);
+            mHoldButton.setContentDescription(getContext().getString(
+                    value ? R.string.onscreenHoldText_selected
+                            : R.string.onscreenHoldText_unselected));
         }
     }
 
@@ -436,9 +441,17 @@
         mPauseVideoButton.setSelected(isPaused);
     }
 
+    @Override
+    public void setMute(boolean value) {
+        if (mMuteButton.isSelected() != value) {
+            mMuteButton.setSelected(value);
+        }
+    }
+
     /**The function is called when Modify Call button gets pressed. The function creates and
      * displays modify call options.
      */
+    @Override
     public void displayModifyCallOptions() {
         CallButtonPresenter.CallButtonUi ui = getUi();
         if (ui == null) {
@@ -509,65 +522,68 @@
         return "";
     }
 
+    private void addToOverflowMenu(int id, View button, PopupMenu menu) {
+        button.setVisibility(View.GONE);
+        menu.getMenu().add(Menu.NONE, id, Menu.NONE, button.getContentDescription());
+        mButtonVisibilityMap.put(id, BUTTON_MENU);
+    }
+
+    private PopupMenu getPopupMenu() {
+        return new PopupMenu(new ContextThemeWrapper(getActivity(), R.style.InCallPopupMenuStyle),
+                mOverflowButton);
+    }
+
+    /**
+     * Iterates through the list of buttons and toggles their visibility depending on the
+     * setting configured by the CallButtonPresenter. If there are more visible buttons than
+     * the allowed maximum, the excess buttons are collapsed into a single overflow menu.
+     */
     @Override
-    public void configureOverflowMenu(boolean showMergeMenuOption, boolean showAddMenuOption,
-            boolean showHoldMenuOption, boolean showSwapMenuOption,
-            boolean showManageConferenceVideoCallOption) {
-        if (mOverflowPopup == null) {
-            final ContextThemeWrapper contextWrapper = new ContextThemeWrapper(getActivity(),
-                    R.style.InCallPopupMenuStyle);
-            mOverflowPopup = new PopupMenu(contextWrapper, mOverflowButton);
-            mOverflowPopup.getMenuInflater().inflate(R.menu.incall_overflow_menu,
-                    mOverflowPopup.getMenu());
+    public void updateButtonStates() {
+        View prevVisibleButton = null;
+        int prevVisibleId = -1;
+        PopupMenu menu = null;
+        int visibleCount = 0;
+        for (int i = 0; i < BUTTON_COUNT; i++) {
+            final int visibility = mButtonVisibilityMap.get(i);
+            final View button = getButtonById(i);
+            if (visibility == BUTTON_VISIBLE) {
+                visibleCount++;
+                if (visibleCount <= BUTTON_MAX_VISIBLE) {
+                    button.setVisibility(View.VISIBLE);
+                    prevVisibleButton = button;
+                    prevVisibleId = i;
+                } else {
+                    if (menu == null) {
+                        menu = getPopupMenu();
+                    }
+                    // Collapse the current button into the overflow menu. If is the first visible
+                    // button that exceeds the threshold, also collapse the previous visible button
+                    // so that the total number of visible buttons will never exceed the threshold.
+                    if (prevVisibleButton != null) {
+                        addToOverflowMenu(prevVisibleId, prevVisibleButton, menu);
+                        prevVisibleButton = null;
+                        prevVisibleId = -1;
+                    }
+                    addToOverflowMenu(i, button, menu);
+                }
+            } else if (visibility == BUTTON_HIDDEN){
+                button.setVisibility(View.GONE);
+            }
+        }
+
+        mOverflowButton.setVisibility(menu != null ? View.VISIBLE : View.GONE);
+        if (menu != null) {
+            mOverflowPopup = menu;
             mOverflowPopup.setOnMenuItemClickListener(new OnMenuItemClickListener() {
                 @Override
                 public boolean onMenuItemClick(MenuItem item) {
-                    switch (item.getItemId()) {
-                        case R.id.overflow_merge_menu_item:
-                            getPresenter().mergeClicked();
-                            break;
-                        case R.id.overflow_add_menu_item:
-                            getPresenter().addCallClicked();
-                            break;
-                        case R.id.overflow_hold_menu_item:
-                            getPresenter().holdClicked(true /* checked */);
-                            break;
-                        case R.id.overflow_resume_menu_item:
-                            getPresenter().holdClicked(false /* checked */);
-                            break;
-                        case R.id.overflow_swap_menu_item:
-                            getPresenter().addCallClicked();
-                            break;
-                        case R.id.overflow_manage_conference_menu_item:
-                            onManageVideoCallConferenceClicked();
-                            break;
-                        default:
-                            Log.wtf(this, "onMenuItemClick: unexpected overflow menu click");
-                            break;
-                    }
+                    final int id = item.getItemId();
+                    getButtonById(id).performClick();
                     return true;
                 }
             });
-            mOverflowPopup.setOnDismissListener(new OnDismissListener() {
-                @Override
-                public void onDismiss(PopupMenu popupMenu) {
-                    popupMenu.dismiss();
-                }
-            });
         }
-
-        final Menu menu = mOverflowPopup.getMenu();
-        menu.findItem(R.id.overflow_merge_menu_item).setVisible(showMergeMenuOption);
-        menu.findItem(R.id.overflow_add_menu_item).setVisible(showAddMenuOption);
-        menu.findItem(R.id.overflow_hold_menu_item).setVisible(
-                showHoldMenuOption && !mHoldButton.isSelected());
-        menu.findItem(R.id.overflow_resume_menu_item).setVisible(
-                showHoldMenuOption && mHoldButton.isSelected());
-        menu.findItem(R.id.overflow_swap_menu_item).setVisible(showSwapMenuOption);
-        menu.findItem(R.id.overflow_manage_conference_menu_item).setVisible(
-            showManageConferenceVideoCallOption);
-
-        mOverflowButton.setEnabled(menu.hasVisibleItems());
     }
 
     @Override
diff --git a/InCallUI/src/com/android/incallui/CallButtonPresenter.java b/InCallUI/src/com/android/incallui/CallButtonPresenter.java
index 0faebfd..cc13a87 100644
--- a/InCallUI/src/com/android/incallui/CallButtonPresenter.java
+++ b/InCallUI/src/com/android/incallui/CallButtonPresenter.java
@@ -18,7 +18,6 @@
 
 import static com.android.incallui.CallButtonFragment.Buttons.*;
 
-import android.app.AlertDialog;
 import android.content.Context;
 import android.os.Bundle;
 import android.telecom.AudioState;
@@ -48,7 +47,6 @@
     private Call mCall;
     private boolean mAutomaticallyMuted = false;
     private boolean mPreviousMuteState = false;
-    private static final int BUTTON_THRESOLD_TO_DISPLAY_OVERFLOW_MENU = 5;
 
     public CallButtonPresenter() {
     }
@@ -121,7 +119,7 @@
     @Override
     public void onDetailsChanged(Call call, android.telecom.Call.Details details) {
         if (getUi() != null && Objects.equals(call, mCall)) {
-            updateCallButtons(call, getUi().getContext());
+            updateButtonsState(call);
         }
     }
 
@@ -133,7 +131,7 @@
     @Override
     public void onCanAddCallChanged(boolean canAddCall) {
         if (getUi() != null && mCall != null) {
-            updateCallButtons(mCall, getUi().getContext());
+            updateButtonsState(mCall);
         }
     }
 
@@ -342,7 +340,7 @@
             return;
         }
 
-        updateCallButtons(call, ui.getContext());
+        updateButtonsState(call);
 
         ui.enableButton(BUTTON_MUTE, call.can(android.telecom.Call.Details.CAPABILITY_MUTE));
     }
@@ -355,136 +353,49 @@
      * Updates the buttons applicable for the UI.
      *
      * @param call The active call.
-     * @param context The context.
      */
-    private void updateCallButtons(Call call, Context context) {
-        if (CallUtils.isVideoCall(call)) {
-            updateVideoCallButtons(call);
-        }
-        updateVoiceCallButtons(call);
-    }
-
-    private void updateVideoCallButtons(Call call) {
-        Log.v(this, "Showing buttons for video call.");
-        final CallButtonUi ui = getUi();
-
-        // Show all video-call-related buttons.
-        ui.showButton(BUTTON_SWITCH_CAMERA, true);
-        ui.showButton(BUTTON_PAUSE_VIDEO, true);
-
-        final boolean supportHold = call.can(android.telecom.Call.Details.CAPABILITY_SUPPORT_HOLD);
-        final boolean enableHoldOption = call.can(android.telecom.Call.Details.CAPABILITY_HOLD);
-        ui.showButton(BUTTON_HOLD, supportHold);
-        ui.enableButton(BUTTON_HOLD, enableHoldOption);
-        ui.setHold(call.getState() == Call.State.ONHOLD);
-    }
-
-    private void updateVoiceCallButtons(Call call) {
+    private void updateButtonsState(Call call) {
         Log.v(this, "Showing buttons for voice call.");
         final CallButtonUi ui = getUi();
 
-        // Hide all video-call-related buttons.
-        ui.showButton(BUTTON_DOWNGRADE_TO_VOICE, false);
-        ui.showButton(BUTTON_SWITCH_CAMERA, false);
-        ui.showButton(BUTTON_PAUSE_VIDEO, false);
+        final boolean isVideo = CallUtils.isVideoCall(call);
 
-        // Show all voice-call-related buttons.
-        ui.showButton(BUTTON_AUDIO, true);
-        ui.showButton(BUTTON_DIALPAD,  true);
-
-        Log.v(this, "Show hold ", call.can(android.telecom.Call.Details.CAPABILITY_SUPPORT_HOLD));
-        Log.v(this, "Enable hold", call.can(android.telecom.Call.Details.CAPABILITY_HOLD));
-        Log.v(this, "Show merge ", call.can(
-                android.telecom.Call.Details.CAPABILITY_MERGE_CONFERENCE));
-        Log.v(this, "Show swap ", call.can(
-                android.telecom.Call.Details.CAPABILITY_SWAP_CONFERENCE));
-        Log.v(this, "Show add call ", TelecomAdapter.getInstance().canAddCall());
-        Log.v(this, "Show mute ", call.can(android.telecom.Call.Details.CAPABILITY_MUTE));
-        Log.v(this, "Show video call local:",
-                        call.can(android.telecom.Call.Details.CAPABILITY_SUPPORTS_VT_LOCAL)
-                        + " remote: "
-                        + call.can(android.telecom.Call.Details.CAPABILITY_SUPPORTS_VT_REMOTE));
-
-        final boolean canAdd = TelecomAdapter.getInstance().canAddCall();
-        final boolean enableHoldOption = call.can(android.telecom.Call.Details.CAPABILITY_HOLD);
-        final boolean supportHold = call.can(android.telecom.Call.Details.CAPABILITY_SUPPORT_HOLD);
-        final boolean isCallOnHold = call.getState() == Call.State.ONHOLD;
-
-        boolean canVideoCall = call.can(android.telecom.Call.Details.CAPABILITY_SUPPORTS_VT_LOCAL)
-                && call.can(android.telecom.Call.Details.CAPABILITY_SUPPORTS_VT_REMOTE);
-        ui.showButton(BUTTON_UPGRADE_TO_VIDEO, canVideoCall);
-
-        final boolean showMergeOption = call.can(
-                android.telecom.Call.Details.CAPABILITY_MERGE_CONFERENCE);
-        final boolean showAddCallOption = canAdd;
-        final boolean showManageVideoCallConferenceOption = call.can(
-                android.telecom.Call.Details.CAPABILITY_MANAGE_CONFERENCE)
-                && CallUtils.isVideoCall(call);
-
+        // Common functionality (audio, hold, etc).
         // Show either HOLD or SWAP, but not both. If neither HOLD or SWAP is available:
         //     (1) If the device normally can hold, show HOLD in a disabled state.
         //     (2) If the device doesn't have the concept of hold/swap, remove the button.
-        final boolean showSwapOption = call.can(
+        final boolean showSwap = call.can(
                 android.telecom.Call.Details.CAPABILITY_SWAP_CONFERENCE);
-        final boolean showHoldOption = !showSwapOption && (enableHoldOption || supportHold);
+        final boolean showHold = !showSwap
+                && call.can(android.telecom.Call.Details.CAPABILITY_SUPPORT_HOLD)
+                && call.can(android.telecom.Call.Details.CAPABILITY_HOLD);
+        final boolean isCallOnHold = call.getState() == Call.State.ONHOLD;
 
+        final boolean showAddCall = TelecomAdapter.getInstance().canAddCall();
+        final boolean showMerge = call.can(
+                android.telecom.Call.Details.CAPABILITY_MERGE_CONFERENCE);
+        final boolean showUpgradeToVideo = !isVideo
+                && call.can(android.telecom.Call.Details.CAPABILITY_SUPPORTS_VT_LOCAL)
+                && call.can(android.telecom.Call.Details.CAPABILITY_SUPPORTS_VT_REMOTE);
+
+        final boolean showMute = call.can(android.telecom.Call.Details.CAPABILITY_MUTE);
+
+        ui.showButton(BUTTON_AUDIO, true);
+        ui.showButton(BUTTON_SWAP, showSwap);
+        ui.showButton(BUTTON_HOLD, showHold);
         ui.setHold(isCallOnHold);
-        //Initialize buttonCount = 2. Because speaker and dialpad these two always show in Call UI.
-        int buttonCount = 2;
-        buttonCount += toInteger(canVideoCall);
-        buttonCount += toInteger(showAddCallOption);
-        buttonCount += toInteger(showMergeOption);
-        buttonCount += toInteger(showHoldOption);
-        buttonCount += toInteger(showSwapOption);
-        buttonCount += toInteger(call.can(android.telecom.Call.Details.CAPABILITY_MUTE));
-        buttonCount += toInteger(showManageVideoCallConferenceOption);
+        ui.showButton(BUTTON_MUTE, showMute);
+        ui.showButton(BUTTON_ADD_CALL, showAddCall);
+        // TODO: This button is currently being used for both upgrade and downgrade scenarios.
+        // It should be split into BUTTON_DOWNGRADE_TO_VOICE AND BUTTON_UPGRADE_TO_VIDEO
+        ui.showButton(BUTTON_UPGRADE_TO_VIDEO, true);
+        ui.showButton(BUTTON_DOWNGRADE_TO_VOICE, false);
+        ui.showButton(BUTTON_SWITCH_CAMERA, isVideo);
+        ui.showButton(BUTTON_PAUSE_VIDEO, isVideo);
+        ui.showButton(BUTTON_DIALPAD, !isVideo);
+        ui.showButton(BUTTON_MERGE, showMerge);
 
-        Log.v(this, "show ManageVideoCallConference: " + showManageVideoCallConferenceOption);
-        Log.v(this, "No of InCall buttons: " + buttonCount + " canVideoCall: " + canVideoCall);
-
-        // Show overflow menu if number of buttons is greater than 5.
-        final boolean showOverflowMenu =
-                buttonCount > BUTTON_THRESOLD_TO_DISPLAY_OVERFLOW_MENU;
-        final boolean isVideoOverflowScenario = canVideoCall && showOverflowMenu;
-        final boolean isOverflowScenario = !canVideoCall && showOverflowMenu;
-
-        if (isVideoOverflowScenario) {
-            ui.showButton(BUTTON_HOLD, false);
-            ui.showButton(BUTTON_SWAP, false);
-            ui.showButton(BUTTON_ADD_CALL, false);
-            ui.showButton(BUTTON_MERGE, false);
-            ui.showButton(BUTTON_MANAGE_VIDEO_CONFERENCE, false);
-
-            ui.configureOverflowMenu(
-                    showMergeOption,
-                    showAddCallOption /* showAddMenuOption */,
-                    showHoldOption && enableHoldOption /* showHoldMenuOption */,
-                    showSwapOption,
-                    showManageVideoCallConferenceOption);
-            ui.showButton(BUTTON_OVERFLOW, true);
-        } else {
-            if (isOverflowScenario) {
-                ui.showButton(BUTTON_ADD_CALL, false);
-                ui.showButton(BUTTON_MERGE, false);
-                ui.showButton(BUTTON_MANAGE_VIDEO_CONFERENCE, false);
-
-                ui.configureOverflowMenu(
-                        showMergeOption,
-                        showAddCallOption /* showAddMenuOption */,
-                        false /* showHoldMenuOption */,
-                        false /* showSwapMenuOption */,
-                        showManageVideoCallConferenceOption);
-            } else {
-                ui.showButton(BUTTON_MERGE, showMergeOption);
-                ui.showButton(BUTTON_ADD_CALL, showAddCallOption);
-                ui.showButton(BUTTON_MANAGE_VIDEO_CONFERENCE, showManageVideoCallConferenceOption);
-            }
-
-            ui.showButton(BUTTON_OVERFLOW, isOverflowScenario);
-            ui.showButton(BUTTON_HOLD, showHoldOption);
-            ui.enableButton(BUTTON_HOLD, enableHoldOption);
-            ui.showButton(BUTTON_SWAP, showSwapOption);
-        }
+        ui.updateButtonStates();
     }
 
     public void refreshMuteState() {
@@ -528,9 +439,12 @@
         void displayDialpad(boolean on, boolean animate);
         void displayModifyCallOptions();
         boolean isDialpadVisible();
-        void configureOverflowMenu(boolean showMergeMenuOption, boolean showAddMenuOption,
-                boolean showHoldMenuOption, boolean showSwapMenuOption,
-                boolean showManageConferenceVideoCallOption);
+
+        /**
+         * Once showButton() has been called on each of the individual buttons in the UI, call
+         * this to configure the overflow menu appropriately.
+         */
+        void updateButtonStates();
         Context getContext();
     }