Hi. I'm sitting here with my bald old iPhone 4, looking blankly into its black eye screen (seriously, it's all beaten up hah) and still not able to figure out what's wrong. I've bought it a couple years ago from the UK (eBay, IIRC). It was with a contract, so it was jailbroken & hacktivated. I don't really remember how it was back then, but a year later at max I have already noticed that iMessage and FaceTime don't work - didn't have use for these and didn't really look into it. Quite some time later I factory unlocked it (it was on o2, apparently) and ditched the jailbreak. But neither iMessage, nor FaceTime budged. Now, after quite a few factory resets and iOS versions later, I've been trying to get these to work again with no avail. The strangest thing here is that both DO get activated, but trying to send an iMessage just gives 'Not Delivered' with that ghastly exclamation mark, and calling FaceTime returns 'Connection Lost' instantly. I do, however, get the iMessages and use FaceTime freely on the same Apple ID and phone number on my Macbook. Any suggestions on how to beat this inclimate imp of a problem?