diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 5e9d33a..24c56a7 100755
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -2567,7 +2567,7 @@
         sDefaults.putBoolean(KEY_CARRIER_FORCE_DISABLE_ETWS_CMAS_TEST_BOOL, false);
         sDefaults.putBoolean(KEY_CARRIER_VOLTE_PROVISIONING_REQUIRED_BOOL, false);
         sDefaults.putBoolean(KEY_CARRIER_UT_PROVISIONING_REQUIRED_BOOL, false);
-        sDefaults.putBoolean(KEY_CARRIER_SUPPORTS_SS_OVER_UT_BOOL, true);
+        sDefaults.putBoolean(KEY_CARRIER_SUPPORTS_SS_OVER_UT_BOOL, false);
         sDefaults.putBoolean(KEY_CARRIER_VOLTE_OVERRIDE_WFC_PROVISIONING_BOOL, false);
         sDefaults.putBoolean(KEY_CARRIER_VOLTE_TTY_SUPPORTED_BOOL, true);
         sDefaults.putBoolean(KEY_CARRIER_ALLOW_TURNOFF_IMS_BOOL, true);