diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index a155428..504d558 100644
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -203,4 +203,9 @@
 
     <!-- ImsService package name to bind to by default, if config_dynamic_bind_ims is true -->
     <string name="config_ims_package">org.codeaurora.ims</string>
+
+    <!-- Config determines whether to update phone object when voice registration
+         state changes. Voice radio tech change will always trigger an update of
+         phone object irrespective of this config -->
+    <bool name="config_switch_phone_on_voice_reg_state_change">false</bool>
 </resources>