You are lucky, because on my lumia 735 from the last update all the alarms sounds I put don't work. It's just the default sound that sounds, and it is at a very low volume that I can barely hear (I think it's about 1 or 2) I cannot change anything. If I change the default sound, that's the one Alarm uses, all the time even if I set another one... any idea how to reset this stupid thing ?