Why is my samsung s8+ randomly ringing

[Android Central Question]

My Samsung s8+ randomly ringing my ringtone and no one is ringing me no call log carnt stop the ringing unless I ring someone else's number please help its driving me nuts ??

 

[Centerman66]

Try a different dialer

 

[Rukbat]

Change the default ringtone. Is it still ringing with the old ringtone or the new one? (Old one means it's not the phone ringing.)