diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index c460aa0..fc8e91d 100644
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -31,6 +31,9 @@
         <item>"supl"</item>
     </string-array>
 
+    <!-- Flag specifying whether VoLTE is available on device -->
+    <bool name="config_device_volte_available">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