diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 2f39a7cc09261..1502cb32564dd 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -2491,6 +2491,13 @@ public class CarrierConfigManager {
     public static final String KEY_5G_ICON_CONFIGURATION_STRING =
             "5g_icon_configuration_string";
 
+    /**
+     * Indicates use 3GPP application to replace 3GPP2 application even if it's a CDMA/CDMA-LTE
+     * phone, becasue some carriers's CSIM application is present but not supported.
+     * @hide
+     */
+    public static final String KEY_USE_USIM_BOOL = "use_usim_bool";
+
     /** The default value for every variable. */
     private final static PersistableBundle sDefaults;
 
@@ -2872,6 +2879,7 @@ public class CarrierConfigManager {
                 });
         sDefaults.putString(KEY_5G_ICON_CONFIGURATION_STRING,
                 "connected_mmwave:None,connected:5G,not_restricted:None,restricted:None");
+        sDefaults.putBoolean(KEY_USE_USIM_BOOL, false);
     }
 
     /**