diff --git a/telephony/java/com/android/internal/telephony/ISms.aidl b/telephony/java/com/android/internal/telephony/ISms.aidl
index 9e975e9c2a0ce..53429b6351c03 100644
--- a/telephony/java/com/android/internal/telephony/ISms.aidl
+++ b/telephony/java/com/android/internal/telephony/ISms.aidl
@@ -222,6 +222,17 @@ interface ISms {
      */
     void injectSmsPdu(in byte[] pdu, String format, in PendingIntent receivedIntent);
 
+    /**
+     * Update the status of a pending (send-by-IP) SMS message and resend by PSTN if necessary.
+     * This outbound message was handled by the carrier app. If the carrier app fails to send
+     * this message, it would be resent by PSTN.
+     *
+     * @param messageRef the reference number of the SMS message.
+     * @param success True if and only if the message was sent successfully. If its value is
+     *  false, this message should be resent via PSTN.
+     */
+    void updateSmsSendStatus(int messageRef, boolean success);
+
     /**
      * Send a multi-part text based SMS.
      *