So I decided it's time to get an iPhone 4S. 1. Buy locked to AT&T iPhone 4S, will be shipped outside US. 2. Buy Gevey Ultra S for iPhone 4S. 3. Unlock the phone. Does the phone need to be already activated if i'm doing the unlock outside the US or can I activate it outside the US with an AT&T sim card? Also I understand that facetime and iMessage will only work with an email. Anything else important I should know, will I run into problems? I've waited a long time and i'm deciding it's time to get this phone.