diff --git a/telephony/java/com/android/internal/telephony/ISms.aidl b/telephony/java/com/android/internal/telephony/ISms.aidl
index 647f014..828e025 100644
--- a/telephony/java/com/android/internal/telephony/ISms.aidl
+++ b/telephony/java/com/android/internal/telephony/ISms.aidl
@@ -1,5 +1,6 @@
 /*
 ** Copyright 2007, The Android Open Source Project
+** Copyright (c) 2012, The Linux Foundation. All rights reserved.
 **
 ** Licensed under the Apache License, Version 2.0 (the "License");
 ** you may not use this file except in compliance with the License.
@@ -215,4 +216,26 @@
      * Requires system permission.
      */
     void setPremiumSmsPermission(String packageName, int permission);
+
+    /**
+     * SMS over IMS is supported if IMS is registered and SMS is supported
+     * on IMS.
+     *
+     * @return true if SMS over IMS is supported, false otherwise
+     *
+     * @see #getImsSmsFormat()
+     */
+    boolean isImsSmsSupported();
+
+    /**
+     * Gets SMS format supported on IMS.  SMS over IMS format is
+     * either 3GPP or 3GPP2.
+     *
+     * @return android.telephony.SmsMessage.FORMAT_3GPP,
+     *         android.telephony.SmsMessage.FORMAT_3GPP2
+     *      or android.telephony.SmsMessage.FORMAT_UNKNOWN
+     *
+     * @see #isImsSmsSupported()
+     */
+    String getImsSmsFormat();
 }
diff --git a/telephony/java/com/android/internal/telephony/RILConstants.java b/telephony/java/com/android/internal/telephony/RILConstants.java
index 9650b99..5a7f13a 100644
--- a/telephony/java/com/android/internal/telephony/RILConstants.java
+++ b/telephony/java/com/android/internal/telephony/RILConstants.java
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2006 The Android Open Source Project
+ * Copyright (c) 2012, The Linux Foundation. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -262,6 +263,8 @@
     int RIL_REQUEST_VOICE_RADIO_TECH = 108;
     int RIL_REQUEST_GET_CELL_INFO_LIST = 109;
     int RIL_REQUEST_SET_UNSOL_CELL_INFO_LIST_RATE = 110;
+    int RIL_REQUEST_IMS_REGISTRATION_STATE = 111;
+    int RIL_REQUEST_IMS_SEND_SMS = 112;
     int RIL_UNSOL_RESPONSE_BASE = 1000;
     int RIL_UNSOL_RESPONSE_RADIO_STATE_CHANGED = 1000;
     int RIL_UNSOL_RESPONSE_CALL_STATE_CHANGED = 1001;
@@ -300,4 +303,5 @@
     int RIL_UNSOL_RIL_CONNECTED = 1034;
     int RIL_UNSOL_VOICE_RADIO_TECH_CHANGED = 1035;
     int RIL_UNSOL_CELL_INFO_LIST = 1036;
+    int RIL_UNSOL_RESPONSE_IMS_NETWORK_STATE_CHANGED = 1037;
 }
diff --git a/telephony/java/com/android/internal/telephony/SmsConstants.java b/telephony/java/com/android/internal/telephony/SmsConstants.java
index 1ccdc3b..a36697a 100644
--- a/telephony/java/com/android/internal/telephony/SmsConstants.java
+++ b/telephony/java/com/android/internal/telephony/SmsConstants.java
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2012 The Android Open Source Project
+ * Copyright (c) 2012, The Linux Foundation. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -62,6 +63,12 @@
     }
 
     /**
+     * Indicates unknown format SMS message.
+     * @hide pending API council approval
+     */
+    public static final String FORMAT_UNKNOWN = "unknown";
+
+    /**
      * Indicates a 3GPP format SMS message.
      * @hide pending API council approval
      */