diff --git a/core/api/system-current.txt b/core/api/system-current.txt
index 883f277bfa592..c3b13d2f7adc6 100644
--- a/core/api/system-current.txt
+++ b/core/api/system-current.txt
@@ -11806,6 +11806,8 @@ package android.telephony.ims.stub {
     method public final void onSubscriberAssociatedUriChanged(android.net.Uri[]);
     method public final void onTechnologyChangeFailed(int, android.telephony.ims.ImsReasonInfo);
     method public void triggerFullNetworkRegistration(@IntRange(from=100, to=699) int, @Nullable String);
+    method public void triggerSipDelegateDeregistration();
+    method public void updateSipDelegateRegistration();
     field public static final int REGISTRATION_TECH_IWLAN = 1; // 0x1
     field public static final int REGISTRATION_TECH_LTE = 0; // 0x0
     field public static final int REGISTRATION_TECH_NONE = -1; // 0xffffffff
diff --git a/telephony/java/android/telephony/ims/aidl/IImsRegistration.aidl b/telephony/java/android/telephony/ims/aidl/IImsRegistration.aidl
index 298a98274dd93..4fd904041365f 100644
--- a/telephony/java/android/telephony/ims/aidl/IImsRegistration.aidl
+++ b/telephony/java/android/telephony/ims/aidl/IImsRegistration.aidl
@@ -29,4 +29,6 @@ interface IImsRegistration {
    oneway void addRegistrationCallback(IImsRegistrationCallback c);
    oneway void removeRegistrationCallback(IImsRegistrationCallback c);
    oneway void triggerFullNetworkRegistration(int sipCode, String sipReason);
-}
\ No newline at end of file
+   oneway void triggerUpdateSipDelegateRegistration();
+   oneway void triggerSipDelegateDeregistration();
+}
diff --git a/telephony/java/android/telephony/ims/stub/ImsRegistrationImplBase.java b/telephony/java/android/telephony/ims/stub/ImsRegistrationImplBase.java
index aee24ffccc9eb..088a7e26a9d0e 100644
--- a/telephony/java/android/telephony/ims/stub/ImsRegistrationImplBase.java
+++ b/telephony/java/android/telephony/ims/stub/ImsRegistrationImplBase.java
@@ -38,6 +38,9 @@ import java.lang.annotation.RetentionPolicy;
 /**
  * Controls IMS registration for this ImsService and notifies the framework when the IMS
  * registration for this ImsService has changed status.
+ * <p>
+ * Note: There is no guarantee on the thread that the calls from the framework will be called on. It
+ * is the implementors responsibility to handle moving the calls to a working thread if required.
  * @hide
  */
 @SystemApi
@@ -97,6 +100,16 @@ public class ImsRegistrationImplBase {
         public void triggerFullNetworkRegistration(int sipCode, String sipReason) {
             ImsRegistrationImplBase.this.triggerFullNetworkRegistration(sipCode, sipReason);
         }
+
+        @Override
+        public void triggerUpdateSipDelegateRegistration() {
+            ImsRegistrationImplBase.this.updateSipDelegateRegistration();
+        }
+
+        @Override
+        public void triggerSipDelegateDeregistration() {
+            ImsRegistrationImplBase.this.triggerSipDelegateDeregistration();
+        }
     };
 
     private final RemoteCallbackListExt<IImsRegistrationCallback> mCallbacks =
@@ -138,7 +151,6 @@ public class ImsRegistrationImplBase {
      * If the SIP delegate feature tag configuration has changed, then this method will be
      * called in order to let the ImsService know that it can pick up these changes in the IMS
      * registration.
-     * @hide
      */
     public void updateSipDelegateRegistration() {
         // Stub implementation, ImsService should implement this
@@ -155,7 +167,6 @@ public class ImsRegistrationImplBase {
      * <p>
      * This should not affect the registration of features managed by the ImsService itself, such as
      * feature tags related to MMTEL registration.
-     * @hide
      */
     public void triggerSipDelegateDeregistration() {
         // Stub implementation, ImsService should implement this