hello, was ever there such a thing as an iphone 3GS with the new bootrom version that came with 3.1.2 Firmware? If so, and if this firmware was never updated to 3.1.3, and then jailbroken using spirit JB, could it be unlocked? I need answer fast guys! reason i ask is because i found this sale online ebay, he has great feedback and claims these phones can be unlocked and jb and have 3.1.2 firmware. but on the photo I see part number beginning with MC which means its a new bootrom.