Weird problem that just developed a few days ago with no conceivable trigger. My phone won't ring when I have an incoming call. Message alerts are audible, music is audible, video is audible. Just no ringing! I (of course) checked mute switch and DND, both are off. Sounds in settings are set correctly....it just won't ring! Also, my alarm is audible when it is set to go off, but if I hit snooze, the second alarm is also not audible. Any suggestions?