diff --git a/audio/aidl/Android.bp b/audio/aidl/Android.bp
index e69306e..56ac510 100644
--- a/audio/aidl/Android.bp
+++ b/audio/aidl/Android.bp
@@ -109,7 +109,6 @@
         "android.hardware.audio_defaults",
     ],
     srcs: [
-        "android/hardware/audio/core/AudioMode.aidl",
         "android/hardware/audio/core/AudioPatch.aidl",
         "android/hardware/audio/core/AudioRoute.aidl",
         "android/hardware/audio/core/IBluetooth.aidl",
diff --git a/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/AudioMode.aidl b/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/AudioMode.aidl
deleted file mode 100644
index 336f9b5..0000000
--- a/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/AudioMode.aidl
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * Copyright (C) 2022 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.
- */
-///////////////////////////////////////////////////////////////////////////////
-// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
-///////////////////////////////////////////////////////////////////////////////
-
-// This file is a snapshot of an AIDL file. Do not edit it manually. There are
-// two cases:
-// 1). this is a frozen version file - do not edit this in any case.
-// 2). this is a 'current' file. If you make a backwards compatible change to
-//     the interface (from the latest frozen version), the build system will
-//     prompt you to update this file with `m <name>-update-api`.
-//
-// You must not make a backward incompatible change to any AIDL file built
-// with the aidl_interface module type with versions property set. The module
-// type is used to build AIDL files in a way that they can be used across
-// independently updatable components of the system. If a device is shipped
-// with such a backward incompatible change, it has a high risk of breaking
-// later when a module using the interface is updated, e.g., Mainline modules.
-
-package android.hardware.audio.core;
-@Backing(type="int") @VintfStability
-enum AudioMode {
-  NORMAL = 0,
-  RINGTONE = 1,
-  IN_CALL = 2,
-  IN_COMMUNICATION = 3,
-  CALL_SCREEN = 4,
-}
diff --git a/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IBluetooth.aidl b/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IBluetooth.aidl
index 289c0c2..9357a15 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IBluetooth.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IBluetooth.aidl
@@ -44,10 +44,10 @@
     @nullable @utf8InCpp String debugName;
     @VintfStability
     enum Mode {
-      UNSPECIFIED = 0,
-      SCO = 1,
-      SCO_WB = 2,
-      SCO_SWB = 3,
+      UNSPECIFIED,
+      SCO,
+      SCO_WB,
+      SCO_SWB,
     }
   }
   @JavaDerive(equals=true, toString=true) @VintfStability
diff --git a/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IModule.aidl b/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IModule.aidl
index 4486b66..960e69f 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IModule.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/IModule.aidl
@@ -59,7 +59,7 @@
   boolean getMicMute();
   void setMicMute(boolean mute);
   android.hardware.audio.core.MicrophoneInfo[] getMicrophones();
-  void updateAudioMode(android.hardware.audio.core.AudioMode mode);
+  void updateAudioMode(android.media.audio.common.AudioMode mode);
   void updateScreenRotation(android.hardware.audio.core.IModule.ScreenRotation rotation);
   void updateScreenState(boolean isTurnedOn);
   @nullable android.hardware.audio.core.sounddose.ISoundDose getSoundDose();
diff --git a/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/ITelephony.aidl b/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/ITelephony.aidl
index 77063df..001d074 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/ITelephony.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.core/current/android/hardware/audio/core/ITelephony.aidl
@@ -34,8 +34,8 @@
 package android.hardware.audio.core;
 @VintfStability
 interface ITelephony {
-  android.hardware.audio.core.AudioMode[] getSupportedAudioModes();
-  void switchAudioMode(android.hardware.audio.core.AudioMode mode);
+  android.media.audio.common.AudioMode[] getSupportedAudioModes();
+  void switchAudioMode(android.media.audio.common.AudioMode mode);
   android.hardware.audio.core.ITelephony.TelecomConfig setTelecomConfig(in android.hardware.audio.core.ITelephony.TelecomConfig config);
   @JavaDerive(equals=true, toString=true) @VintfStability
   parcelable TelecomConfig {
diff --git a/audio/aidl/android/hardware/audio/core/AudioMode.aidl b/audio/aidl/android/hardware/audio/core/AudioMode.aidl
deleted file mode 100644
index 0943a55..0000000
--- a/audio/aidl/android/hardware/audio/core/AudioMode.aidl
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Copyright (C) 2022 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.hardware.audio.core;
-
-/**
- * The audio mode describes states of the audio system of the device that
- * can significantly affect the rules of audio routing, volume control, etc.
- * The audio mode is controlled by the framework, however the HAL has some
- * flexibility in the choice of modes to support, see 'IModule.updateAudioMode'.
- */
-@VintfStability
-@Backing(type="int")
-enum AudioMode {
-    /** No active calls. */
-    NORMAL = 0,
-    /** The device is playing the ringtone. */
-    RINGTONE = 1,
-    /** The call is handled by the telephony stack ("voice call"). */
-    IN_CALL = 2,
-    /** The call is handled by an application ("VoIP call"). */
-    IN_COMMUNICATION = 3,
-    /** Call screening is in progress. */
-    CALL_SCREEN = 4,
-}
diff --git a/audio/aidl/android/hardware/audio/core/IModule.aidl b/audio/aidl/android/hardware/audio/core/IModule.aidl
index 7bc1b9c..2c478f2 100644
--- a/audio/aidl/android/hardware/audio/core/IModule.aidl
+++ b/audio/aidl/android/hardware/audio/core/IModule.aidl
@@ -18,7 +18,6 @@
 
 import android.hardware.audio.common.SinkMetadata;
 import android.hardware.audio.common.SourceMetadata;
-import android.hardware.audio.core.AudioMode;
 import android.hardware.audio.core.AudioPatch;
 import android.hardware.audio.core.AudioRoute;
 import android.hardware.audio.core.IBluetooth;
@@ -33,6 +32,7 @@
 import android.hardware.audio.core.VendorParameter;
 import android.hardware.audio.core.sounddose.ISoundDose;
 import android.hardware.audio.effect.IEffect;
+import android.media.audio.common.AudioMode;
 import android.media.audio.common.AudioOffloadInfo;
 import android.media.audio.common.AudioPort;
 import android.media.audio.common.AudioPortConfig;
@@ -684,6 +684,7 @@
      * method.
      *
      * @param mode The current mode.
+     * @throws EX_ILLEGAL_ARGUMENT If the mode is out of range of valid values.
      */
     void updateAudioMode(AudioMode mode);
 
diff --git a/audio/aidl/android/hardware/audio/core/ITelephony.aidl b/audio/aidl/android/hardware/audio/core/ITelephony.aidl
index a817032..7fc1ace 100644
--- a/audio/aidl/android/hardware/audio/core/ITelephony.aidl
+++ b/audio/aidl/android/hardware/audio/core/ITelephony.aidl
@@ -16,7 +16,7 @@
 
 package android.hardware.audio.core;
 
-import android.hardware.audio.core.AudioMode;
+import android.media.audio.common.AudioMode;
 import android.media.audio.common.Boolean;
 import android.media.audio.common.Float;
 
@@ -52,6 +52,7 @@
      *
      * @param mode The mode to switch to.
      * @throws EX_UNSUPPORTED_OPERATION If the HAL does not support the specified mode.
+     * @throws EX_ILLEGAL_ARGUMENT If the mode is out of range of valid values.
      * @throws EX_ILLEGAL_STATE If there was an error during switching.
      */
     void switchAudioMode(AudioMode mode);
diff --git a/audio/aidl/common/include/Utils.h b/audio/aidl/common/include/Utils.h
index 8f0c986..2aaa781 100644
--- a/audio/aidl/common/include/Utils.h
+++ b/audio/aidl/common/include/Utils.h
@@ -16,6 +16,8 @@
 
 #pragma once
 
+#include <algorithm>
+#include <array>
 #include <initializer_list>
 #include <type_traits>
 
@@ -23,11 +25,22 @@
 #include <aidl/android/media/audio/common/AudioDeviceType.h>
 #include <aidl/android/media/audio/common/AudioFormatDescription.h>
 #include <aidl/android/media/audio/common/AudioInputFlags.h>
+#include <aidl/android/media/audio/common/AudioMode.h>
 #include <aidl/android/media/audio/common/AudioOutputFlags.h>
 #include <aidl/android/media/audio/common/PcmType.h>
 
 namespace android::hardware::audio::common {
 
+// Some values are reserved for use by the system code only.
+// HALs must not accept or emit values outside from the provided list.
+constexpr std::array<::aidl::android::media::audio::common::AudioMode, 5> kValidAudioModes = {
+        ::aidl::android::media::audio::common::AudioMode::NORMAL,
+        ::aidl::android::media::audio::common::AudioMode::RINGTONE,
+        ::aidl::android::media::audio::common::AudioMode::IN_CALL,
+        ::aidl::android::media::audio::common::AudioMode::IN_COMMUNICATION,
+        ::aidl::android::media::audio::common::AudioMode::CALL_SCREEN,
+};
+
 constexpr size_t getPcmSampleSizeInBytes(::aidl::android::media::audio::common::PcmType pcm) {
     using ::aidl::android::media::audio::common::PcmType;
     switch (pcm) {
@@ -91,6 +104,11 @@
            device == ::aidl::android::media::audio::common::AudioDeviceType::OUT_TELEPHONY_TX;
 }
 
+constexpr bool isValidAudioMode(::aidl::android::media::audio::common::AudioMode mode) {
+    return std::find(kValidAudioModes.begin(), kValidAudioModes.end(), mode) !=
+           kValidAudioModes.end();
+}
+
 // The helper functions defined below are only applicable to the case when an enum type
 // specifies zero-based bit positions, not bit masks themselves. This is why instantiation
 // is restricted to certain enum types.
diff --git a/audio/aidl/default/Module.cpp b/audio/aidl/default/Module.cpp
index acad70f..a6e1d0d 100644
--- a/audio/aidl/default/Module.cpp
+++ b/audio/aidl/default/Module.cpp
@@ -41,6 +41,7 @@
 using aidl::android::media::audio::common::AudioFormatType;
 using aidl::android::media::audio::common::AudioInputFlags;
 using aidl::android::media::audio::common::AudioIoFlags;
+using aidl::android::media::audio::common::AudioMode;
 using aidl::android::media::audio::common::AudioOffloadInfo;
 using aidl::android::media::audio::common::AudioOutputFlags;
 using aidl::android::media::audio::common::AudioPort;
@@ -52,6 +53,7 @@
 using aidl::android::media::audio::common::PcmType;
 using android::hardware::audio::common::getFrameSizeInBytes;
 using android::hardware::audio::common::isBitPositionFlagSet;
+using android::hardware::audio::common::isValidAudioMode;
 
 namespace aidl::android::hardware::audio::core {
 
@@ -952,6 +954,10 @@
 }
 
 ndk::ScopedAStatus Module::updateAudioMode(AudioMode in_mode) {
+    if (!isValidAudioMode(in_mode)) {
+        LOG(ERROR) << __func__ << ": invalid mode " << toString(in_mode);
+        return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
+    }
     // No checks for supported audio modes here, it's an informative notification.
     LOG(DEBUG) << __func__ << ": " << toString(in_mode);
     return ndk::ScopedAStatus::ok();
diff --git a/audio/aidl/default/Telephony.cpp b/audio/aidl/default/Telephony.cpp
index d873178..ad22470 100644
--- a/audio/aidl/default/Telephony.cpp
+++ b/audio/aidl/default/Telephony.cpp
@@ -14,14 +14,18 @@
  * limitations under the License.
  */
 
-#include <android/binder_to_string.h>
 #define LOG_TAG "AHAL_Telephony"
 #include <android-base/logging.h>
 
+#include <Utils.h>
+#include <android/binder_to_string.h>
+
 #include "core-impl/Telephony.h"
 
+using aidl::android::media::audio::common::AudioMode;
 using aidl::android::media::audio::common::Boolean;
 using aidl::android::media::audio::common::Float;
+using android::hardware::audio::common::isValidAudioMode;
 
 namespace aidl::android::hardware::audio::core {
 
@@ -38,6 +42,10 @@
 }
 
 ndk::ScopedAStatus Telephony::switchAudioMode(AudioMode in_mode) {
+    if (!isValidAudioMode(in_mode)) {
+        LOG(ERROR) << __func__ << ": invalid mode " << toString(in_mode);
+        return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
+    }
     if (std::find(mSupportedAudioModes.begin(), mSupportedAudioModes.end(), in_mode) !=
         mSupportedAudioModes.end()) {
         LOG(DEBUG) << __func__ << ": " << toString(in_mode);
diff --git a/audio/aidl/default/include/core-impl/Module.h b/audio/aidl/default/include/core-impl/Module.h
index 9e4499b..3cce769 100644
--- a/audio/aidl/default/include/core-impl/Module.h
+++ b/audio/aidl/default/include/core-impl/Module.h
@@ -92,7 +92,7 @@
     ndk::ScopedAStatus setMicMute(bool in_mute) override;
     ndk::ScopedAStatus getMicrophones(std::vector<MicrophoneInfo>* _aidl_return) override;
     ndk::ScopedAStatus updateAudioMode(
-            ::aidl::android::hardware::audio::core::AudioMode in_mode) override;
+            ::aidl::android::media::audio::common::AudioMode in_mode) override;
     ndk::ScopedAStatus updateScreenRotation(
             ::aidl::android::hardware::audio::core::IModule::ScreenRotation in_rotation) override;
     ndk::ScopedAStatus updateScreenState(bool in_isTurnedOn) override;
diff --git a/audio/aidl/default/include/core-impl/Telephony.h b/audio/aidl/default/include/core-impl/Telephony.h
index 0936172..0f8e93f 100644
--- a/audio/aidl/default/include/core-impl/Telephony.h
+++ b/audio/aidl/default/include/core-impl/Telephony.h
@@ -27,13 +27,20 @@
     Telephony();
 
   private:
-    ndk::ScopedAStatus getSupportedAudioModes(std::vector<AudioMode>* _aidl_return) override;
-    ndk::ScopedAStatus switchAudioMode(AudioMode in_mode) override;
+    ndk::ScopedAStatus getSupportedAudioModes(
+            std::vector<::aidl::android::media::audio::common::AudioMode>* _aidl_return) override;
+    ndk::ScopedAStatus switchAudioMode(
+            ::aidl::android::media::audio::common::AudioMode in_mode) override;
     ndk::ScopedAStatus setTelecomConfig(const TelecomConfig& in_config,
                                         TelecomConfig* _aidl_return) override;
 
-    const std::vector<AudioMode> mSupportedAudioModes = {::ndk::enum_range<AudioMode>().begin(),
-                                                         ::ndk::enum_range<AudioMode>().end()};
+    const std::vector<::aidl::android::media::audio::common::AudioMode> mSupportedAudioModes = {
+            ::aidl::android::media::audio::common::AudioMode::NORMAL,
+            ::aidl::android::media::audio::common::AudioMode::RINGTONE,
+            ::aidl::android::media::audio::common::AudioMode::IN_CALL,
+            ::aidl::android::media::audio::common::AudioMode::IN_COMMUNICATION,
+            // Omit CALL_SCREEN for a better VTS coverage.
+    };
     TelecomConfig mTelecomConfig;
 };
 
diff --git a/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp b/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
index d4f2811..a8febc5 100644
--- a/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
+++ b/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
@@ -54,7 +54,6 @@
 using aidl::android::hardware::audio::common::RecordTrackMetadata;
 using aidl::android::hardware::audio::common::SinkMetadata;
 using aidl::android::hardware::audio::common::SourceMetadata;
-using aidl::android::hardware::audio::core::AudioMode;
 using aidl::android::hardware::audio::core::AudioPatch;
 using aidl::android::hardware::audio::core::AudioRoute;
 using aidl::android::hardware::audio::core::IBluetooth;
@@ -78,6 +77,7 @@
 using aidl::android::media::audio::common::AudioFormatType;
 using aidl::android::media::audio::common::AudioIoFlags;
 using aidl::android::media::audio::common::AudioLatencyMode;
+using aidl::android::media::audio::common::AudioMode;
 using aidl::android::media::audio::common::AudioOutputFlags;
 using aidl::android::media::audio::common::AudioPlaybackRate;
 using aidl::android::media::audio::common::AudioPort;
@@ -93,6 +93,7 @@
 using android::hardware::audio::common::getChannelCount;
 using android::hardware::audio::common::isBitPositionFlagSet;
 using android::hardware::audio::common::isTelephonyDeviceType;
+using android::hardware::audio::common::isValidAudioMode;
 using android::hardware::audio::common::StreamLogic;
 using android::hardware::audio::common::StreamWorker;
 using ndk::enum_range;
@@ -1805,7 +1806,11 @@
 
 TEST_P(AudioCoreModule, UpdateAudioMode) {
     for (const auto mode : ::ndk::enum_range<AudioMode>()) {
-        EXPECT_IS_OK(module->updateAudioMode(mode)) << toString(mode);
+        if (isValidAudioMode(mode)) {
+            EXPECT_IS_OK(module->updateAudioMode(mode)) << toString(mode);
+        } else {
+            EXPECT_STATUS(EX_ILLEGAL_ARGUMENT, module->updateAudioMode(mode)) << toString(mode);
+        }
     }
     EXPECT_IS_OK(module->updateAudioMode(AudioMode::NORMAL));
 }
@@ -1994,6 +1999,9 @@
     }
     std::vector<AudioMode> modes1;
     ASSERT_IS_OK(telephony->getSupportedAudioModes(&modes1));
+    for (const auto mode : modes1) {
+        EXPECT_TRUE(isValidAudioMode(mode)) << toString(mode);
+    }
     const std::vector<AudioMode> kMandatoryModes = {AudioMode::NORMAL, AudioMode::RINGTONE,
                                                     AudioMode::IN_CALL,
                                                     AudioMode::IN_COMMUNICATION};
@@ -2025,7 +2033,9 @@
         unsupportedModes.erase(mode);
     }
     for (const auto mode : unsupportedModes) {
-        EXPECT_STATUS(EX_UNSUPPORTED_OPERATION, telephony->switchAudioMode(mode)) << toString(mode);
+        EXPECT_STATUS(isValidAudioMode(mode) ? EX_UNSUPPORTED_OPERATION : EX_ILLEGAL_ARGUMENT,
+                      telephony->switchAudioMode(mode))
+                << toString(mode);
     }
 }