diff --git a/radio/aidl/aidl_api/android.hardware.radio.ims/current/android/hardware/radio/ims/SuggestedAction.aidl b/radio/aidl/aidl_api/android.hardware.radio.ims/current/android/hardware/radio/ims/SuggestedAction.aidl
index 120e7e8..6dbf09d 100644
--- a/radio/aidl/aidl_api/android.hardware.radio.ims/current/android/hardware/radio/ims/SuggestedAction.aidl
+++ b/radio/aidl/aidl_api/android.hardware.radio.ims/current/android/hardware/radio/ims/SuggestedAction.aidl
@@ -38,4 +38,6 @@
   NONE,
   TRIGGER_PLMN_BLOCK,
   TRIGGER_PLMN_BLOCK_WITH_TIMEOUT,
+  TRIGGER_RAT_BLOCK,
+  TRIGGER_CLEAR_RAT_BLOCK,
 }
diff --git a/radio/aidl/android/hardware/radio/ims/SuggestedAction.aidl b/radio/aidl/android/hardware/radio/ims/SuggestedAction.aidl
index 443042d..f0e28fc 100644
--- a/radio/aidl/android/hardware/radio/ims/SuggestedAction.aidl
+++ b/radio/aidl/android/hardware/radio/ims/SuggestedAction.aidl
@@ -35,4 +35,18 @@
      * management timer value as per the carrier requirements.
      */
     TRIGGER_PLMN_BLOCK_WITH_TIMEOUT,
+    /**
+     * Indicates that the IMS registration on current RAT failed multiple times.
+     * The radio shall block the current RAT and search for other available RATs in the
+     * background. If no other RAT is available that meets the carrier requirements, the
+     * radio may remain on the current RAT for internet service. The radio clears all
+     * RATs marked as unavailable if {@link IRadioIms#updateImsRegistrationInfo()} API
+     * with REGISTERED state is invoked.
+     */
+    TRIGGER_RAT_BLOCK,
+    /**
+     * Indicates that the radio clears all RATs marked as unavailable and tries to find
+     * an available RAT that meets the carrier requirements.
+     */
+    TRIGGER_CLEAR_RAT_BLOCK,
 }