diff --git a/core/res/res/values/config_telephony.xml b/core/res/res/values/config_telephony.xml
index a1d73ff25cb81..94cf1b2ada0e2 100644
--- a/core/res/res/values/config_telephony.xml
+++ b/core/res/res/values/config_telephony.xml
@@ -117,4 +117,9 @@
     <!-- Whether using the new SubscriptionManagerService or the old SubscriptionController -->
     <bool name="config_using_subscription_manager_service">false</bool>
     <java-symbol type="bool" name="config_using_subscription_manager_service" />
+
+    <!-- Whether asynchronously update the subscription database or not. Async mode increases
+         the performance, but sync mode reduces the chance of database/cache out-of-sync. -->
+    <bool name="config_subscription_database_async_update">true</bool>
+    <java-symbol type="bool" name="config_subscription_database_async_update" />
 </resources>