Since it appears that Apple has fixed the issue with their activation servers, latecomers to the SAM iPhone unlock party are left in the lurch. Fortunately, not all users have lost the potential to unlock their iPhones.
Those who were proactive enough to unlock their iPhone using SAM, and backed up their activation tickets can still easily restore those tickets and unlock their iPhones if they have to restore their device for whatever reason.
If you’re currently unlocked on an unofficial SIM by means of the SAM unlock, backup your activation ticket now before you lose it. We can’t stress this enough.
Keep in mind that you will still need a jailbroken iPhone to accomplish this, and you will need your backed up Lockdown folder that you saved-off after successfully unlocking your device the first go-round…