I ordered a factory unlock from swift unlocks last night; this morning got the "UNLOCKED" e-mail reply. There are instructions for unlocking if your phone is jailbroken (mine is) - basically put it into DFU mode and click Restore while connected to iTunes. My question is.... Will the current ios installed on my phone create any issues during the restore or should I update to ios 5 before attempting anything. Also, I do not have a valid AT&T sim card if I encounter any activation issues. Any other words of wisdom before beginning?