Samsung mobile phone has no SMS prompt tone.

I suggest you: 1. Turn the machine on and off and try again. 2. Drop down the top curtain menu to see if there are unread messages. 3. Check whether the alarm clock or calendar has been set. 3. Back up mobile phone data (phone book, SMS, multimedia files, etc.). ), restore the factory settings (enter the phone settings-reset-restore the factory settings) or send the phone to the nearest Samsung service center for testing and further processing.