diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 362c40302b618..e349ae9ec4476 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -336,6 +336,19 @@ public class CarrierConfigManager {
     public static final String KEY_NOTIFY_HANDOVER_VIDEO_FROM_WIFI_TO_LTE_BOOL =
             "notify_handover_video_from_wifi_to_lte_bool";
 
+    /**
+     * Flag specifying whether the carrier wants to notify the user when a VT call has been handed
+     * over from LTE to WIFI.
+     * <p>
+     * The handover notification is sent as a
+     * {@link TelephonyManager#EVENT_HANDOVER_VIDEO_FROM_LTE_TO_WIFI}
+     * {@link android.telecom.Connection} event, which an {@link android.telecom.InCallService}
+     * should use to trigger the display of a user-facing message.
+     * @hide
+     */
+    public static final String KEY_NOTIFY_HANDOVER_VIDEO_FROM_LTE_TO_WIFI_BOOL =
+            "notify_handover_video_from_lte_to_wifi_bool";
+
     /**
      * Flag specifying whether the carrier supports downgrading a video call (tx, rx or tx/rx)
      * directly to an audio call.
@@ -1753,6 +1766,7 @@ public class CarrierConfigManager {
         sDefaults.putBoolean(KEY_CARRIER_VOLTE_AVAILABLE_BOOL, false);
         sDefaults.putBoolean(KEY_CARRIER_VT_AVAILABLE_BOOL, false);
         sDefaults.putBoolean(KEY_NOTIFY_HANDOVER_VIDEO_FROM_WIFI_TO_LTE_BOOL, false);
+        sDefaults.putBoolean(KEY_NOTIFY_HANDOVER_VIDEO_FROM_LTE_TO_WIFI_BOOL, false);
         sDefaults.putBoolean(KEY_SUPPORT_DOWNGRADE_VT_TO_AUDIO_BOOL, true);
         sDefaults.putString(KEY_DEFAULT_VM_NUMBER_STRING, "");
         sDefaults.putBoolean(KEY_CONFIG_TELEPHONY_USE_OWN_NUMBER_FOR_VOICEMAIL_BOOL, false);
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index f278d7c22e759..4328bc08a325b 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -831,6 +831,17 @@ public class TelephonyManager {
     public static final String EVENT_HANDOVER_VIDEO_FROM_WIFI_TO_LTE =
             "android.telephony.event.EVENT_HANDOVER_VIDEO_FROM_WIFI_TO_LTE";
 
+    /**
+     * {@link android.telecom.Connection} event used to indicate that an IMS call has be
+     * successfully handed over from LTE to WIFI.
+     * <p>
+     * Sent via {@link android.telecom.Connection#sendConnectionEvent(String, Bundle)}.
+     * The {@link Bundle} parameter is expected to be null when this connection event is used.
+     * @hide
+     */
+    public static final String EVENT_HANDOVER_VIDEO_FROM_LTE_TO_WIFI =
+            "android.telephony.event.EVENT_HANDOVER_VIDEO_FROM_LTE_TO_WIFI";
+
     /**
      * {@link android.telecom.Connection} event used to indicate that an IMS call failed to be
      * handed over from LTE to WIFI.