My facetime hasn't been working for a few days... The facetime 'button' under settings, phone... is switched to off and when I try to switch it back to on it just says "waiting for activation" and after a few minutes it just switches back to off... Can anyone help with this? A few people tell me that I will have to do a restore to get it working again but if I do a restore, won't I have to restore to the latest 4.2.1 firmware through itunes? is there a way around that?