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Horsham, PA

Seemed easy enough

Unlocked a 3GS last fall when I upgraded to an iPhone 5. No issues since I had completed my contract, but it was a PITA to do, I had to completely restore the phone from within iTunes, something with Apple actually keeps the master list of unlocked phones and once you submit your info to AT&T and they verify that your contract is met and your account is in good standing, they send your IEMI number over to Apple and they put it on a "whitelist" and when you restore your phone, it goes to Apple's servers to 'activate' if you will, and gets a siganl to now unlock the phone. At least I think that's how it works.