I've had a problem with Sony Xperia Z, Z1 and now the Z1 compact. The alarm clock is unreliable. Not the clock itself actually, every now and then (2-3 times a month) the sound just disappears. This means the alarm clock goes off, but no sound to wake you. When I check, there is no ring sound, sms sound until a reboot.
The only times this happens is during the night, never experienced it at daytime. I've tried to google this, but it seems like I am the only one with this issue. Had it with 3 sony phones witch I guess use some of the same software from Sony..
Anyone else had this? solved it?