why is my phone ringing?

[Android Central Question]

i have not long bought an HTC M9. just recently it has started ringing, yet showing no call on either the phone icon, or the call register, and there is no opportunity to answer it. it uses my normal ringtone. is this a notification of some kind and if so how do i turn it off?

 

[Golfdriver97]

Welcome to the forums. I would try a reboot. It might be a bug somewhere, and hopefully dies when the reboot happens.

 

[Rukbat]

Does some other app use your call ringtone? Only if you set it to.