diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index ef0f71ab9954a..8487cb3e15d84 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -2070,6 +2070,13 @@ public class CarrierConfigManager {
     public static final String KEY_UNDELIVERED_SMS_MESSAGE_EXPIRATION_TIME =
             "undelivered_sms_message_expiration_time";
 
+    /**
+     * 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;
 
@@ -2402,6 +2409,7 @@ public class CarrierConfigManager {
                         -85  /* SIGNAL_STRENGTH_GREAT */
                 });
         sDefaults.putString(KEY_WCDMA_DEFAULT_SIGNAL_STRENGTH_MEASUREMENT_STRING, "");
+        sDefaults.putBoolean(KEY_USE_USIM_BOOL, false);
     }
 
     /**