diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index c6f5e9c..90e4bd9 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -64,7 +64,7 @@
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
     <uses-permission android:name="android.permission.USE_COLORIZED_NOTIFICATIONS"/>
     <uses-permission android:name="android.permission.USE_FULL_SCREEN_INTENT"/>
-    <uses-permission android:name="com.android.phone.permission.ACCESS_LAST_KNOWN_CELL_ID"/>
+    <uses-permission android:name="android.permission.ACCESS_LAST_KNOWN_CELL_ID"/>
     <uses-permission android:name="android.permission.STATUS_BAR_SERVICE" />
 
     <permission android:name="android.permission.BROADCAST_CALLLOG_INFO"
diff --git a/flags/telecom_api_flags.aconfig b/flags/telecom_api_flags.aconfig
index 74cb447..36f20d8 100644
--- a/flags/telecom_api_flags.aconfig
+++ b/flags/telecom_api_flags.aconfig
@@ -27,3 +27,11 @@
   description: "The key is used for dialer apps to mark missed calls as read when it gets the notification on reboot."
   bug: "292597423"
 }
+
+
+flag{
+  name: "set_mute_state"
+  namespace: "telecom"
+  description: "transactional calls need the ability to mute the call audio input"
+  bug: "310669304"
+}
diff --git a/flags/telecom_callaudioroutestatemachine_flags.aconfig b/flags/telecom_callaudioroutestatemachine_flags.aconfig
index 6f2c7fc..fe21c92 100644
--- a/flags/telecom_callaudioroutestatemachine_flags.aconfig
+++ b/flags/telecom_callaudioroutestatemachine_flags.aconfig
@@ -62,3 +62,10 @@
   description: "Update supported route mask when Bluetooth devices audio connected."
   bug: "301695370"
 }
+
+flag {
+  name: "clear_communication_device_after_audio_ops_complete"
+  namespace: "telecom"
+  description: "Clear the requested communication device after the audio operations are completed."
+  bug: "315865533"
+}
diff --git a/src/com/android/server/telecom/Call.java b/src/com/android/server/telecom/Call.java
index 8b9d07d..341d77e 100644
--- a/src/com/android/server/telecom/Call.java
+++ b/src/com/android/server/telecom/Call.java
@@ -58,7 +58,6 @@
 import android.telecom.ParcelableConnection;
 import android.telecom.PhoneAccount;
 import android.telecom.PhoneAccountHandle;
-import android.telecom.Response;
 import android.telecom.StatusHints;
 import android.telecom.TelecomManager;
 import android.telecom.VideoProfile;
@@ -3778,7 +3777,7 @@
             Log.d(this, "maybeLoadCannedSmsResponses: starting task to load messages");
             mCannedSmsResponsesLoadingStarted = true;
             mCallsManager.getRespondViaSmsManager().loadCannedTextMessages(
-                    new Response<Void, List<String>>() {
+                    new CallsManager.Response<Void, List<String>>() {
                         @Override
                         public void onResult(Void request, List<String>... result) {
                             if (result.length > 0) {
diff --git a/src/com/android/server/telecom/CallAudioModeStateMachine.java b/src/com/android/server/telecom/CallAudioModeStateMachine.java
index 71956a1..6420f2e 100644
--- a/src/com/android/server/telecom/CallAudioModeStateMachine.java
+++ b/src/com/android/server/telecom/CallAudioModeStateMachine.java
@@ -280,7 +280,10 @@
             mLocalLog.log("Enter UNFOCUSED");
             if (mIsInitialized) {
                 // Clear any communication device that was requested previously.
-                if (mFeatureFlags.callAudioCommunicationDeviceRefactor()) {
+                // Todo: Remove once clearCommunicationDeviceAfterAudioOpsComplete is
+                // completely rolled out.
+                if (mFeatureFlags.callAudioCommunicationDeviceRefactor()
+                        && !mFeatureFlags.clearCommunicationDeviceAfterAudioOpsComplete()) {
                     mCommunicationDeviceTracker.clearCommunicationDevice(mCommunicationDeviceTracker
                             .getCurrentLocallyRequestedCommunicationDevice());
                 }
@@ -353,6 +356,12 @@
                     } else {
                         mAudioManager.abandonAudioFocusForCall();
                     }
+                    // Clear requested communication device after the call ends.
+                    if (mFeatureFlags.clearCommunicationDeviceAfterAudioOpsComplete()) {
+                        mCommunicationDeviceTracker.clearCommunicationDevice(
+                                mCommunicationDeviceTracker
+                                        .getCurrentLocallyRequestedCommunicationDevice());
+                    }
                     return HANDLED;
                 default:
                     // The forced focus switch commands are handled by BaseState.
diff --git a/src/com/android/server/telecom/CallsManager.java b/src/com/android/server/telecom/CallsManager.java
old mode 100755
new mode 100644
index 22d8a02..5734405
--- a/src/com/android/server/telecom/CallsManager.java
+++ b/src/com/android/server/telecom/CallsManager.java
@@ -73,6 +73,7 @@
 import android.os.Process;
 import android.os.ResultReceiver;
 import android.os.SystemClock;
+import android.os.SystemProperties;
 import android.os.SystemVibrator;
 import android.os.Trace;
 import android.os.UserHandle;
@@ -224,6 +225,29 @@
         void performAction();
     }
 
+    /**
+     * @hide
+     */
+    public interface Response<IN, OUT> {
+
+        /**
+         * Provide a set of results.
+         *
+         * @param request The original request.
+         * @param result The results.
+         */
+        void onResult(IN request, OUT... result);
+
+        /**
+         * Indicates the inability to provide results.
+         *
+         * @param request The original request.
+         * @param code An integer code indicating the reason for failure.
+         * @param msg A message explaining the reason for failure.
+         */
+        void onError(IN request, int code, String msg);
+    }
+
     private static final String TAG = "CallsManager";
 
     /**
@@ -2976,10 +3000,6 @@
                 Log.d(this, "answerCall: Incoming call = %s Ongoing call %s", call, activeCall);
             }
             // Hold or disconnect the active call and request call focus for the incoming call.
-            Bundle bundle = new Bundle();
-            bundle.putLong(TelecomManager.EXTRA_CALL_ANSWERED_TIME_MILLIS,
-                     mClockProxy.currentTimeMillis());
-            call.putConnectionServiceExtras(bundle);
             holdActiveCallForNewCall(call);
             mConnectionSvrFocusMgr.requestFocus(
                     call,
@@ -3131,9 +3151,8 @@
      * @return {@code true} if the speakerphone should automatically be enabled.
      */
     private static boolean isSpeakerEnabledForVideoCalls() {
-        return TelephonyProperties.videocall_audio_output()
-                .orElse(TelecomManager.AUDIO_OUTPUT_DEFAULT)
-                == TelecomManager.AUDIO_OUTPUT_ENABLE_SPEAKER;
+        return SystemProperties.getInt(TelecomManager.PROPERTY_VIDEOCALL_AUDIO_OUTPUT,
+                TelecomManager.AUDIO_OUTPUT_DEFAULT) == TelecomManager.AUDIO_OUTPUT_ENABLE_SPEAKER;
     }
 
     /**
@@ -3500,7 +3519,7 @@
     }
 
     /** Called by the in-call UI to change the mute state. */
-    void mute(boolean shouldMute) {
+    public void mute(boolean shouldMute) {
         if (isInEmergencyCall() && shouldMute) {
             Log.i(this, "Refusing to turn on mute because we're in an emergency call");
             shouldMute = false;
diff --git a/src/com/android/server/telecom/RespondViaSmsManager.java b/src/com/android/server/telecom/RespondViaSmsManager.java
index 1d42db4..2dcd093 100644
--- a/src/com/android/server/telecom/RespondViaSmsManager.java
+++ b/src/com/android/server/telecom/RespondViaSmsManager.java
@@ -27,7 +27,6 @@
 import android.content.res.Resources;
 import android.telecom.Connection;
 import android.telecom.Log;
-import android.telecom.Response;
 import android.telephony.PhoneNumberUtils;
 import android.telephony.SmsManager;
 import android.telephony.SubscriptionManager;
@@ -92,7 +91,7 @@
      *                 the main thread.
      * @param context The context.
      */
-    public void loadCannedTextMessages(final Response<Void, List<String>> response,
+    public void loadCannedTextMessages(final CallsManager.Response<Void, List<String>> response,
             final Context context) {
         new Thread() {
             @Override
diff --git a/src/com/android/server/telecom/TransactionalServiceWrapper.java b/src/com/android/server/telecom/TransactionalServiceWrapper.java
index 02ccef7..938ee58 100644
--- a/src/com/android/server/telecom/TransactionalServiceWrapper.java
+++ b/src/com/android/server/telecom/TransactionalServiceWrapper.java
@@ -46,6 +46,7 @@
 import com.android.server.telecom.voip.ParallelTransaction;
 import com.android.server.telecom.voip.RequestNewActiveCallTransaction;
 import com.android.server.telecom.voip.SerialTransaction;
+import com.android.server.telecom.voip.SetMuteStateTransaction;
 import com.android.server.telecom.voip.TransactionManager;
 import com.android.server.telecom.voip.VoipCallTransaction;
 import com.android.server.telecom.voip.VoipCallTransactionResult;
@@ -225,6 +226,18 @@
         }
 
         @Override
+        public void setMuteState(boolean isMuted, android.os.ResultReceiver callback)
+                throws RemoteException {
+            try {
+                Log.startSession("TSW.sMS");
+                addTransactionsToManager(
+                        new SetMuteStateTransaction(mCallsManager, isMuted), callback);
+            } finally {
+                Log.endSession();
+            }
+        }
+
+        @Override
         public void startCallStreaming(String callId, android.os.ResultReceiver callback)
                 throws RemoteException {
             try {
diff --git a/src/com/android/server/telecom/voip/SetMuteStateTransaction.java b/src/com/android/server/telecom/voip/SetMuteStateTransaction.java
new file mode 100644
index 0000000..d9f7329
--- /dev/null
+++ b/src/com/android/server/telecom/voip/SetMuteStateTransaction.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2024 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 com.android.server.telecom.voip;
+
+import android.util.Log;
+
+import com.android.server.telecom.CallsManager;
+
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+
+/**
+ * This transaction should be used to change the global mute state for transactional
+ * calls. There is currently no way for this transaction to fail.
+ */
+public class SetMuteStateTransaction extends VoipCallTransaction {
+
+    private static final String TAG = SetMuteStateTransaction.class.getSimpleName();
+    private final CallsManager mCallsManager;
+    private final boolean mIsMuted;
+
+    public SetMuteStateTransaction(CallsManager callsManager, boolean isMuted) {
+        super(callsManager.getLock());
+        mCallsManager = callsManager;
+        mIsMuted = isMuted;
+    }
+
+    @Override
+    public CompletionStage<VoipCallTransactionResult> processTransaction(Void v) {
+        Log.d(TAG, "processTransaction");
+        CompletableFuture<VoipCallTransactionResult> future = new CompletableFuture<>();
+
+        mCallsManager.mute(mIsMuted);
+
+        future.complete(new VoipCallTransactionResult(
+                VoipCallTransactionResult.RESULT_SUCCEED,
+                "The Mute State was changed successfully"));
+
+        return future;
+    }
+}