diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index c22a1cbc663a2..e91831a3327b1 100755
--- a/core/res/res/values/config.xml
+++ b/core/res/res/values/config.xml
@@ -2066,4 +2066,11 @@
 
     <!-- Whether to start in touch mode -->
     <bool name="config_defaultInTouchMode">true</bool>
+
+    <!-- The RadioAccessFamilies supported by the device.
+         Empty is viewed as "all".  Only used on devices which
+         don't support RIL_REQUEST_GET_RADIO_CAPABILITY
+         format is UMTS|LTE|... -->
+    <string translatable="false" name="config_radio_access_family"></string>
+
 </resources>
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index d33f667f5d0ec..03147cfd418b6 100755
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -2179,4 +2179,5 @@
   <java-symbol type="bool" name="config_use_sim_language_file" />
   <java-symbol type="bool" name="config_LTE_eri_for_network_name" />
   <java-symbol type="bool" name="config_defaultInTouchMode" />
+  <java-symbol type="string" name="config_radio_access_family" />
 </resources>
diff --git a/telephony/java/android/telephony/RadioAccessFamily.java b/telephony/java/android/telephony/RadioAccessFamily.java
index 9fea418b82c8b..0c5c5577d5111 100644
--- a/telephony/java/android/telephony/RadioAccessFamily.java
+++ b/telephony/java/android/telephony/RadioAccessFamily.java
@@ -255,5 +255,43 @@ public class RadioAccessFamily implements Parcelable {
 
         return type;
     }
-}
 
+    public static int singleRafTypeFromString(String rafString) {
+        switch (rafString) {
+            case "GPRS":    return RAF_GPRS;
+            case "EDGE":    return RAF_EDGE;
+            case "UMTS":    return RAF_UMTS;
+            case "IS95A":   return RAF_IS95A;
+            case "IS95B":   return RAF_IS95B;
+            case "1XRTT":   return RAF_1xRTT;
+            case "EVDO_0":  return RAF_EVDO_0;
+            case "EVDO_A":  return RAF_EVDO_A;
+            case "HSDPA":   return RAF_HSDPA;
+            case "HSUPA":   return RAF_HSUPA;
+            case "HSPA":    return RAF_HSPA;
+            case "EVDO_B":  return RAF_EVDO_B;
+            case "EHRPD":   return RAF_EHRPD;
+            case "LTE":     return RAF_LTE;
+            case "HSPAP":   return RAF_HSPAP;
+            case "GSM":     return RAF_GSM;
+            case "TD_SCDMA":return RAF_TD_SCDMA;
+            case "HS":      return HS;
+            case "CDMA":    return CDMA;
+            case "EVDO":    return EVDO;
+            case "WCDMA":   return WCDMA;
+            default:        return RAF_UNKNOWN;
+        }
+    }
+
+    public static int rafTypeFromString(String rafList) {
+        rafList = rafList.toUpperCase();
+        String[] rafs = rafList.split("\\|");
+        int result = 0;
+        for(String raf : rafs) {
+            int rafType = singleRafTypeFromString(raf.trim());
+            if (rafType == RAF_UNKNOWN) return rafType;
+            result |= rafType;
+        }
+        return result;
+    }
+}