[horndoctor]

When you go to Sounds and Notifications and select incoming call and you select the ringtone you want, when you hit the play button does it play!? Did you change your ringer to a custom ringer? Maybe the ringtone your using isn't compatible or maybe you need to make sure you put the ringtone in windows/rings. Try selecting the standard ring, soft reset and then call your phone and see if it rings.