To fix the error, please follow the below-mentioned steps:

1. Go to Settings -> Phone -> Calls

2. Turn "Call Forwarding" ON. Don't enter a phone number in the field.
3. Press the "Cancel" button

4. Open your phone's dialer, dial *67*5595335694#, and press the send button. 

*Only available in the U.S.


Getting an error? Click here