I have an mp3 that I use as a ringtone. Occasionally, the phone will default to a random ringtone.
When I go to check what tone is selected, nothing is selected.
I open the music app, set the mp3 to ringtone and it shows up in the list again and is selected.
I don't have any ringtone apps installed.
My phone is not rooted.
Any ideas would be appreciated.