diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index 4652ce3..f6adb5d 100644
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -899,4 +899,10 @@
 
     <!-- Whether device supports double tap to wake -->
     <bool name="config_supportDoubleTapWake">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">GSM | WCDMA | LTE</string>
 </resources>