diff --git a/core/api/system-current.txt b/core/api/system-current.txt
index bea4b39..1977bab 100644
--- a/core/api/system-current.txt
+++ b/core/api/system-current.txt
@@ -13796,11 +13796,13 @@
   public static interface RcsCapabilityExchangeImplBase.PublishResponseCallback {
     method public void onCommandError(int) throws android.telephony.ims.ImsException;
     method public void onNetworkResponse(@IntRange(from=100, to=699) int, @NonNull String) throws android.telephony.ims.ImsException;
+    method public void onNetworkResponse(@IntRange(from=100, to=699) int, @NonNull String, @IntRange(from=100, to=699) int, @NonNull String) throws android.telephony.ims.ImsException;
   }
 
   public static interface RcsCapabilityExchangeImplBase.SubscribeResponseCallback {
     method public void onCommandError(int) throws android.telephony.ims.ImsException;
     method public void onNetworkResponse(@IntRange(from=100, to=699) int, @NonNull String) throws android.telephony.ims.ImsException;
+    method public void onNetworkResponse(@IntRange(from=100, to=699) int, @NonNull String, @IntRange(from=100, to=699) int, @NonNull String) throws android.telephony.ims.ImsException;
     method public void onNotifyCapabilitiesUpdate(@NonNull java.util.List<java.lang.String>) throws android.telephony.ims.ImsException;
     method public void onResourceTerminated(@NonNull java.util.List<android.util.Pair<android.net.Uri,java.lang.String>>) throws android.telephony.ims.ImsException;
     method public void onTerminated(@NonNull String, long) throws android.telephony.ims.ImsException;
diff --git a/telephony/java/android/telephony/ims/aidl/IPublishResponseCallback.aidl b/telephony/java/android/telephony/ims/aidl/IPublishResponseCallback.aidl
index 481e7f8..b99d8a7d 100644
--- a/telephony/java/android/telephony/ims/aidl/IPublishResponseCallback.aidl
+++ b/telephony/java/android/telephony/ims/aidl/IPublishResponseCallback.aidl
@@ -26,4 +26,5 @@
 oneway interface IPublishResponseCallback {
     void onCommandError(int code);
     void onNetworkResponse(int code, String reason);
+    void onNetworkRespHeader(int code, String reasonPhrase, int reasonHeaderCause, String reasonHeaderText);
 }
diff --git a/telephony/java/android/telephony/ims/aidl/ISubscribeResponseCallback.aidl b/telephony/java/android/telephony/ims/aidl/ISubscribeResponseCallback.aidl
index a141993..8cc8020 100644
--- a/telephony/java/android/telephony/ims/aidl/ISubscribeResponseCallback.aidl
+++ b/telephony/java/android/telephony/ims/aidl/ISubscribeResponseCallback.aidl
@@ -30,6 +30,7 @@
 oneway interface ISubscribeResponseCallback {
     void onCommandError(int code);
     void onNetworkResponse(int code, in String reason);
+    void onNetworkRespHeader(int code, String reasonPhrase, int reasonHeaderCause, String reasonHeaderText);
     void onNotifyCapabilitiesUpdate(in List<String> pidfXmls);
     void onResourceTerminated(in List<RcsContactTerminatedReason> uriTerminatedReason);
     void onTerminated(in String reason, long retryAfterMilliseconds);
diff --git a/telephony/java/android/telephony/ims/aidl/RcsPublishResponseAidlWrapper.java b/telephony/java/android/telephony/ims/aidl/RcsPublishResponseAidlWrapper.java
index 22985d0..65415ea 100644
--- a/telephony/java/android/telephony/ims/aidl/RcsPublishResponseAidlWrapper.java
+++ b/telephony/java/android/telephony/ims/aidl/RcsPublishResponseAidlWrapper.java
@@ -34,10 +34,11 @@
     }
 
     @Override
-    public void onCommandError(int code) {
+    public void onCommandError(int code) throws ImsException {
         try {
             mResponseBinder.onCommandError(code);
         } catch (RemoteException e) {
+            throw new ImsException(e.getMessage(), ImsException.CODE_ERROR_SERVICE_UNAVAILABLE);
         }
     }
 
@@ -46,6 +47,18 @@
         try {
             mResponseBinder.onNetworkResponse(code, reason);
         } catch (RemoteException e) {
+            throw new ImsException(e.getMessage(), ImsException.CODE_ERROR_SERVICE_UNAVAILABLE);
+        }
+    }
+
+    @Override
+    public void onNetworkResponse(int code, String reasonPhrase, int reasonHeaderCause,
+            String reasonHeaderText) throws ImsException {
+        try {
+            mResponseBinder.onNetworkRespHeader(code, reasonPhrase, reasonHeaderCause,
+                    reasonHeaderText);
+        } catch (RemoteException e) {
+            throw new ImsException(e.getMessage(), ImsException.CODE_ERROR_SERVICE_UNAVAILABLE);
         }
     }
 }
diff --git a/telephony/java/android/telephony/ims/aidl/RcsSubscribeResponseAidlWrapper.java b/telephony/java/android/telephony/ims/aidl/RcsSubscribeResponseAidlWrapper.java
index 1fb339c..11118c0 100644
--- a/telephony/java/android/telephony/ims/aidl/RcsSubscribeResponseAidlWrapper.java
+++ b/telephony/java/android/telephony/ims/aidl/RcsSubscribeResponseAidlWrapper.java
@@ -40,10 +40,11 @@
     }
 
     @Override
-    public void onCommandError(int code) {
+    public void onCommandError(int code) throws ImsException {
         try {
             mResponseBinder.onCommandError(code);
         } catch (RemoteException e) {
+            throw new ImsException(e.getMessage(), ImsException.CODE_ERROR_SERVICE_UNAVAILABLE);
         }
     }
 
@@ -52,6 +53,18 @@
         try {
             mResponseBinder.onNetworkResponse(code, reason);
         } catch (RemoteException e) {
+            throw new ImsException(e.getMessage(), ImsException.CODE_ERROR_SERVICE_UNAVAILABLE);
+        }
+    }
+
+    @Override
+    public void onNetworkResponse(int code, String reasonPhrase, int reasonHeaderCause,
+            String reasonHeaderText) throws ImsException {
+        try {
+            mResponseBinder.onNetworkRespHeader(code, reasonPhrase, reasonHeaderCause,
+                    reasonHeaderText);
+        } catch (RemoteException e) {
+            throw new ImsException(e.getMessage(), ImsException.CODE_ERROR_SERVICE_UNAVAILABLE);
         }
     }
 
@@ -60,6 +73,7 @@
         try {
             mResponseBinder.onNotifyCapabilitiesUpdate(pidfXmls);
         } catch (RemoteException e) {
+            throw new ImsException(e.getMessage(), ImsException.CODE_ERROR_SERVICE_UNAVAILABLE);
         }
     }
 
@@ -69,6 +83,7 @@
         try {
             mResponseBinder.onResourceTerminated(getTerminatedReasonList(uriTerminatedReason));
         } catch (RemoteException e) {
+            throw new ImsException(e.getMessage(), ImsException.CODE_ERROR_SERVICE_UNAVAILABLE);
         }
     }
 
@@ -90,6 +105,7 @@
         try {
             mResponseBinder.onTerminated(reason, retryAfterMilliseconds);
         } catch (RemoteException e) {
+            throw new ImsException(e.getMessage(), ImsException.CODE_ERROR_SERVICE_UNAVAILABLE);
         }
     }
 }
diff --git a/telephony/java/android/telephony/ims/stub/RcsCapabilityExchangeImplBase.java b/telephony/java/android/telephony/ims/stub/RcsCapabilityExchangeImplBase.java
index 7eba709..ec98be6 100644
--- a/telephony/java/android/telephony/ims/stub/RcsCapabilityExchangeImplBase.java
+++ b/telephony/java/android/telephony/ims/stub/RcsCapabilityExchangeImplBase.java
@@ -140,6 +140,9 @@
          * Provide the framework with a subsequent network response update to
          * {@link #publishCapabilities(String, PublishResponseCallback)}.
          *
+         * If this network response also contains a “Reason” header, then the
+         * {@link onNetworkResponse(int, String, int, String)} method should be used instead.
+         *
          * @param sipCode The SIP response code sent from the network for the operation
          * token specified.
          * @param reason The optional reason response from the network. If there is a reason header
@@ -154,6 +157,31 @@
          */
         void onNetworkResponse(@IntRange(from = 100, to = 699) int sipCode,
                 @NonNull String reason) throws ImsException;
+
+        /**
+         * Provide the framework with a subsequent network response update to
+         * {@link #publishCapabilities(RcsContactUceCapability, int)} that also
+         * includes a reason provided in the “reason” header. See RFC3326 for more
+         * information.
+         *
+         * @param sipCode The SIP response code sent from the network.
+         * @param reasonPhrase The optional reason response from the network. If the
+         * network provided no reason with the sip code, the string should be empty.
+         * @param reasonHeaderCause The “cause” parameter of the “reason” header
+         * included in the SIP message.
+         * @param reasonHeaderText The “text” parameter of the “reason” header
+         * included in the SIP message.
+         * @throws ImsException If this {@link RcsCapabilityExchangeImplBase} instance is
+         * not currently connected to the framework. This can happen if the
+         * {@link RcsFeature} is not
+         * {@link ImsFeature#STATE_READY} and the {@link RcsFeature} has not received
+         * the {@link ImsFeature#onFeatureReady()} callback. This may also happen in
+         * rare cases when the Telephony stack has crashed.
+         */
+        void onNetworkResponse(@IntRange(from = 100, to = 699) int sipCode,
+                @NonNull String reasonPhrase,
+                @IntRange(from = 100, to = 699) int reasonHeaderCause,
+                @NonNull String reasonHeaderText) throws ImsException;
     }
 
     /**
@@ -222,6 +250,9 @@
          * {@link #onResourceTerminated}, and {@link #onTerminated} as required for the
          * subsequent NOTIFY responses to the subscription.
          *
+         * If this network response also contains a “Reason” header, then the
+         * {@link onNetworkResponse(int, String, int, String)} method should be used instead.
+         *
          * @param sipCode The SIP response code sent from the network for the operation
          * token specified.
          * @param reason The optional reason response from the network. If the network
@@ -236,6 +267,31 @@
                 @NonNull String reason) throws ImsException;
 
         /**
+         * Notify the framework  of the response to the SUBSCRIBE request from
+         * {@link #subscribeForCapabilities(RcsContactUceCapability, int)} that also
+         * includes a reason provided in the “reason” header. See RFC3326 for more
+         * information.
+         *
+         * @param sipCode The SIP response code sent from the network,
+         * @param reasonPhrase The optional reason response from the network. If the
+         * network provided no reason with the sip code, the string should be empty.
+         * @param reasonHeaderCause The “cause” parameter of the “reason” header
+         * included in the SIP message.
+         * @param reasonHeaderText The “text” parameter of the “reason” header
+         * included in the SIP message.
+         * @throws ImsException If this {@link RcsCapabilityExchangeImplBase} instance is
+         * not currently connected to the framework. This can happen if the
+         * {@link RcsFeature} is not
+         * {@link ImsFeature#STATE_READY} and the {@link RcsFeature} has not received
+         * the {@link ImsFeature#onFeatureReady()} callback. This may also happen in
+         * rare cases when the Telephony stack has crashed.
+         */
+        void onNetworkResponse(@IntRange(from = 100, to = 699) int sipCode,
+                @NonNull String reasonPhrase,
+                @IntRange(from = 100, to = 699) int reasonHeaderCause,
+                @NonNull String reasonHeaderText) throws ImsException;
+
+        /**
          * Notify the framework of the latest XML PIDF documents included in the network response
          * for the requested contacts' capabilities requested by the Framework using
          * {@link RcsUceAdapter#requestCapabilities(Executor, List<Uri>, CapabilitiesCallback)}.