diff --git a/radio/1.0/IRadio.hal b/radio/1.0/IRadio.hal
index f29b916..62bc840 100644
--- a/radio/1.0/IRadio.hal
+++ b/radio/1.0/IRadio.hal
@@ -382,7 +382,7 @@
      *        override the one in the profile. empty string indicates no APN overrride.
      * @param user is the username for APN, or empty string
      * @param password is the password for APN, or empty string
-     * @param authType is the PAP / CHAP auth type. Values:
+     * @param authType is the PAP / CHAP auth type.
      * @param protocol is the connection type to request must be one of the
      *        PDP_type values in TS 27.007 section 10.1.1.
      *        For example, "IP", "IPV6", "IPV4V6", or "PPP".
@@ -1272,7 +1272,7 @@
      * @param protocol is the connection type to request must be one of the
      *        PDP_type values in TS 27.007 section 10.1.1.
      *        For example, "IP", "IPV6", "IPV4V6", or "PPP".
-     * @param authType is the PAP / CHAP auth type. Values:
+     * @param authType is the PAP / CHAP auth type.
      * @param user is the username for APN, or empty string
      * @param password is the password for APN, or empty string
      *
diff --git a/radio/1.0/IRadioResponse.hal b/radio/1.0/IRadioResponse.hal
index c49286b..e25a30c 100644
--- a/radio/1.0/IRadioResponse.hal
+++ b/radio/1.0/IRadioResponse.hal
@@ -1934,4 +1934,13 @@
      */
     oneway getAllowedCarriersResponse(RadioResponseInfo info, bool allAllowed,
             CarrierRestrictions carriers);
+
+    /*
+     * Acknowldege the receipt of radio request sent to the vendor. This must be sent only for
+     * radio request which take long time to respond.
+     * For more details, refer https://source.android.com/devices/tech/connect/ril.html
+     *
+     * @param serial Serial no. of the request whose acknowledgement is sent.
+     */
+    oneway requestAcknowledgement(int32_t serial);
 };
diff --git a/radio/1.0/types.hal b/radio/1.0/types.hal
index 194733a..9c4b453 100644
--- a/radio/1.0/types.hal
+++ b/radio/1.0/types.hal
@@ -1126,16 +1126,17 @@
 };
 
 struct GsmSignalStrength {
-    uint32_t signalStrength;              // Valid values are (0-31, 99) as defined in
-                                          // TS 27.007 8.5
+    uint32_t signalStrength;              // Valid values are (0-61, 99) as defined in
+                                          // TS 27.007 8.69
     uint32_t bitErrorRate;                // bit error rate (0-7, 99) as defined in TS 27.007 8.5
     int32_t timingAdvance;                // Timing Advance in bit periods. 1 bit period = 48/13 us.
                                           // INT_MAX denotes invalid value
 };
 
 struct WcdmaSignalStrength{
-    int32_t signalStrength;               // Valid values are (0-31, 99) as defined in TS 27.007 8.5
-    int32_t bitErrorRate;                 // bit error rate (0-7, 99) as defined in TS 27.007 8.5
+    int32_t signalStrength;               // Valid values are (0-96, 99) as defined in
+                                          // TS 27.007 8.69
+    int32_t bitErrorRate;                 // bit error rate (0-49, 99) as defined in TS 27.007 8.69
 };
 
 struct CdmaSignalStrength {