I have a 3GS that was activated on AT&T. I closed the account and moved overseas, and have been using it as an iPod Touch + camera for a month or two. Now I want to jailbreak and start using it as my phone here. I'm running Jailbreakme, but then can I do the unlocking without an AT&T SIM in there at all? I might have my old one floating around, but it's probably been deactivated, I'd imagine... Thanks!