Alarm randomly does not work. Not "volume turned down" but does not even vibrate, doesn't come on the screen, no notification of missed alarm, nothing. This is a BASIC FUNCTION and I have overslept so many times now because of this. Also, my clock randomly decides to quit showing up on my home screen and it is no longer showing a.m. or p.m. and that's a problem. If you are someone who works swing shifts or night shifts, during winter, it's hard to know if it's 7am or 7pm without double checking