diff --git a/radio/aidl/aidl_api/android.hardware.radio.sim/current/android/hardware/radio/sim/CarrierRestrictions.aidl b/radio/aidl/aidl_api/android.hardware.radio.sim/current/android/hardware/radio/sim/CarrierRestrictions.aidl
index 944f1ca..8a61dca 100644
--- a/radio/aidl/aidl_api/android.hardware.radio.sim/current/android/hardware/radio/sim/CarrierRestrictions.aidl
+++ b/radio/aidl/aidl_api/android.hardware.radio.sim/current/android/hardware/radio/sim/CarrierRestrictions.aidl
@@ -34,7 +34,15 @@
 package android.hardware.radio.sim;
 @JavaDerive(toString=true) @VintfStability
 parcelable CarrierRestrictions {
-  android.hardware.radio.sim.Carrier[] allowedCarriers;
-  android.hardware.radio.sim.Carrier[] excludedCarriers;
-  boolean allowedCarriersPrioritized;
+    @Backing(type="int") @VintfStability
+    enum CarrierRestrictionStatus {
+        UNKNOWN = 0,
+        NOT_RESTRICTED = 1,
+        RESTRICTED = 2,
+    }
+    android.hardware.radio.sim.Carrier[] allowedCarriers;
+    android.hardware.radio.sim.Carrier[] excludedCarriers;
+    boolean allowedCarriersPrioritized;
+    CarrierRestrictionStatus status;
+    int carrierId;
 }
diff --git a/radio/aidl/android/hardware/radio/sim/CarrierRestrictions.aidl b/radio/aidl/android/hardware/radio/sim/CarrierRestrictions.aidl
index 3dce907..5a79f0f 100644
--- a/radio/aidl/android/hardware/radio/sim/CarrierRestrictions.aidl
+++ b/radio/aidl/android/hardware/radio/sim/CarrierRestrictions.aidl
@@ -21,6 +21,22 @@
 @VintfStability
 @JavaDerive(toString=true)
 parcelable CarrierRestrictions {
+    @VintfStability
+    @Backing(type="int")
+    /** This enum defines the carrier restriction status values */
+    enum CarrierRestrictionStatus {
+       /**
+        * Carrier restriction status value is unknown, used in cases where modem is dependent on
+        * external module to know about the lock status and the module hasn’t yet provided the lock
+        * status. For example, when the lock status is maintained on a cloud server and device has
+        * just booted after out of box and not yet connected to the internet.
+        */
+        UNKNOWN = 0,
+        /** There is no carrier restriction on the device */
+        NOT_RESTRICTED = 1,
+        /** The device is restricted to a carrier */
+        RESTRICTED = 2,
+    }
     /**
      * Allowed carriers
      */
@@ -40,4 +56,11 @@
      * and not in the allowed list.
      */
     boolean allowedCarriersPrioritized;
+    /** Current restriction status as defined in CarrierRestrictionStatus enum */
+    CarrierRestrictionStatus status;
+    /**
+    * Android carrier ID of the locked carrier.
+    * see https://source.android.com/docs/core/connect/carrierid
+    */
+    int carrierId;
 }