diff --git a/core/api/system-current.txt b/core/api/system-current.txt
index d4752560c49ab..80ee1a583aa92 100644
--- a/core/api/system-current.txt
+++ b/core/api/system-current.txt
@@ -8982,6 +8982,7 @@ package android.provider {
     field public static final String ACTION_SHOW_ADMIN_SUPPORT_DETAILS = "android.settings.SHOW_ADMIN_SUPPORT_DETAILS";
     field public static final String ACTION_TETHER_PROVISIONING_UI = "android.settings.TETHER_PROVISIONING_UI";
     field public static final String ACTION_TETHER_SETTINGS = "android.settings.TETHER_SETTINGS";
+    field public static final String ACTION_TETHER_UNSUPPORTED_CARRIER_UI = "android.settings.TETHER_UNSUPPORTED_CARRIER_UI";
   }
 
   public static final class Settings.Global extends android.provider.Settings.NameValueTable {
diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index bc7d4313ab1a2..aa66aa353714a 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -238,6 +238,20 @@ public final class Settings {
     public static final String ACTION_TETHER_PROVISIONING_UI =
             "android.settings.TETHER_PROVISIONING_UI";
 
+    /**
+     * Activity Action: Show a dialog activity to notify tethering is NOT supported by carrier.
+     *
+     * When {@link android.telephony.CarrierConfigManager#KEY_CARRIER_SUPPORTS_TETHERING_BOOL}
+     * is false, and tethering is started by Settings, this dialog activity will be started to
+     * tell the user that tethering is not supported by carrier.
+     *
+     * @hide
+     */
+    @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)
+    @SystemApi
+    public static final String ACTION_TETHER_UNSUPPORTED_CARRIER_UI =
+            "android.settings.TETHER_UNSUPPORTED_CARRIER_UI";
+
     /**
      * Activity Action: Show settings to allow entering/exiting airplane mode.
      * <p>