diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index 17216ab451790..bd9e2f6df681a 100644
--- a/core/res/res/values/config.xml
+++ b/core/res/res/values/config.xml
@@ -1846,4 +1846,9 @@
         <item>71610</item>
         <item>732101</item>
     </string-array>
+
+    <!-- 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">true</bool>
 </resources>
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index d8d0ccda8a830..2620c27c4c146 100644
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -2066,4 +2066,5 @@
   <java-symbol type="array" name="dial_string_replace" />
   <java-symbol type="bool" name="config_restart_radio_on_pdp_fail_regular_deactivation" />
   <java-symbol type="array" name="networks_not_clear_data" />
+  <java-symbol type="bool" name="config_switch_phone_on_voice_reg_state_change" />
 </resources>