I have a note 3 on T-Mobile. I received a system update on 12/29/15 I think it was. (within the last week anyway). I have missed my alarm the past few days so started to dig around to see why. My alarm is going off but no sound is happening. I turn my phone to vibrate only allow priority interruptions each night. I double checked and my alarm is still set as a priority interruption. I am not sure what else to try as it seems a setting was changed when I got the system update. I have Jury duty tomorrow and would really like my alarm to be working!!!! lol