diff --git a/telephony/java/android/provider/Telephony.java b/telephony/java/android/provider/Telephony.java
index a241765976a7b..c5d686361da14 100644
--- a/telephony/java/android/provider/Telephony.java
+++ b/telephony/java/android/provider/Telephony.java
@@ -3448,6 +3448,18 @@ public final class Telephony {
          */
         public static final String CARRIER_ID = "carrier_id";
 
+        /**
+         * A unique mno carrier id. mno carrier shares the same {@link All#MCCMNC} as carrier id
+         * and can be solely identified by {@link All#MCCMNC} only. If there is no such mno
+         * carrier, then mno carrier id equals to {@link #CARRIER_ID carrier id}.
+         *
+         * <p>mno carrier id can be used as fallback id. When the exact carrier id configurations
+         * are not found, usually fall back to its mno carrier id.
+         * <P>Type: INTEGER </P>
+         * @hide
+         */
+        public static final String MNO_CARRIER_ID = "mno_carrier_id";
+
         /**
          * Contains mappings between matching rules with carrier id for all carriers.
          * @hide
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index d3cf331fb4c6d..ea44082dd823d 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -1163,6 +1163,16 @@ public class TelephonyManager {
      */
     public static final String EXTRA_CARRIER_ID = "android.telephony.extra.CARRIER_ID";
 
+    /**
+     * An int extra used with {@link #ACTION_SUBSCRIPTION_CARRIER_IDENTITY_CHANGED} which indicates
+     * the updated mno carrier id of the current subscription.
+     * <p>Will be {@link TelephonyManager#UNKNOWN_CARRIER_ID} if the subscription is unavailable or
+     * the carrier cannot be identified.
+     *
+     *@hide
+     */
+    public static final String EXTRA_MNO_CARRIER_ID = "android.telephony.extra.MNO_CARRIER_ID";
+
     /**
      * An string extra used with {@link #ACTION_SUBSCRIPTION_CARRIER_IDENTITY_CHANGED} which
      * indicates the updated carrier name of the current subscription.