I'm in the process of selling an old 3G. It's never been jailbroken/unlocked and currently has the stock 3.1.3 firmware on it. I reset the phone prior to confirming what baseband it was on. I believe it was 5.1.2 or 5.1.3. I know the 3.1.3 FW can be JB'd but I'm wondering can it be unlocked as well? I believe the 5.1.2 and 5.1.3 were unlockable baseband's however I don't want to promise this if I'm incorrect. Would I be correct in assuming that ANY 3G on FW 3.1.3 can JB'd and unlocked? Thanks.