Okay so i've been away 2 days attending a funeral and phone was pretty much on silent all of the time, Ive just got back and realised that I'm no longer getting notification sounds for emails, messages, push messages etc. I've also noticied that the volume control buttons on the side aren't working. However, I have sounds eg: music, can go into settings, select ringtone and hear the preview. Silent's not on, all the settings are on for sound, even restored the phone and nothing changed. I'm finding it really bizzare.... Any Suggestions????