diff --git a/src/java/com/android/ims/ImsManager.java b/src/java/com/android/ims/ImsManager.java
index f943c96..9a436c3 100644
--- a/src/java/com/android/ims/ImsManager.java
+++ b/src/java/com/android/ims/ImsManager.java
@@ -2077,6 +2077,8 @@
 
         if (isCarrierSupported) {
             setRttConfig(shouldImsRttBeOn);
+        } else {
+            setRttConfig(false);
         }
         return isCarrierSupported && shouldImsRttBeOn;
     }