My DROID Turbo 2 won't ring for incoming calls. Only vibrates. The Do-Not-Disturb is not enabled and I have verified the volume is turned all the way up. Under Settings >> Sound, the ringer volume for Media, Alarm, and Ring are all shown at 100%. If I go to CNN and stream something with sound, it plays. Just the stock functionality doesn't work or have sound. Same happens on the Clock App Alarm. It just vibrates when the alarm goes off. If I power-off the device and back on, it immediately rings again / alarm works again but stops working at some point throughout the day. .This issue started after the Version 7 upgrade at the beginning of this month.