diff --git a/telephony/java/android/telephony/ServiceState.java b/telephony/java/android/telephony/ServiceState.java
index 606fcb4..1ee390f 100644
--- a/telephony/java/android/telephony/ServiceState.java
+++ b/telephony/java/android/telephony/ServiceState.java
@@ -797,6 +797,8 @@
             return TelephonyManager.NETWORK_TYPE_LTE;
         case ServiceState.RIL_RADIO_TECHNOLOGY_HSPAP:
             return TelephonyManager.NETWORK_TYPE_HSPAP;
+        case ServiceState.RIL_RADIO_TECHNOLOGY_GSM:
+            return TelephonyManager.NETWORK_TYPE_GSM;
         default:
             return TelephonyManager.NETWORK_TYPE_UNKNOWN;
         }
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 407a8d1..df972d5 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -911,6 +911,8 @@
     public static final int NETWORK_TYPE_EHRPD = 14;
     /** Current network is HSPA+ */
     public static final int NETWORK_TYPE_HSPAP = 15;
+    /** Current network is GSM {@hide} */
+    public static final int NETWORK_TYPE_GSM = 16;
 
     /**
      * @return the NETWORK_TYPE_xxxx for current data connection.
@@ -1002,6 +1004,7 @@
     public static int getNetworkClass(int networkType) {
         switch (networkType) {
             case NETWORK_TYPE_GPRS:
+            case NETWORK_TYPE_GSM:
             case NETWORK_TYPE_EDGE:
             case NETWORK_TYPE_CDMA:
             case NETWORK_TYPE_1xRTT:
@@ -1068,6 +1071,8 @@
                 return "iDEN";
             case NETWORK_TYPE_HSPAP:
                 return "HSPA+";
+            case NETWORK_TYPE_GSM:
+                return "GSM";
             default:
                 return "UNKNOWN";
         }