Hi, guys! I'm new here at the forum, but I found it the best way to ask a question that's bugin' me. Is it possible to use Blacksn0w to jailbreak and unlock the iPhone 3GS (FW 3.1.2 - 05.11.07), and, after that, "un-jailbreak" it?? I'm asking that because I don't have good experiences w/ jailbroken iPhones... my old one (1st G.) kept crashing and had lots of problems... I would like to unlock it, but not use the jailbreak... Is this possible? I guess it is, but how?? Thanks! PS.: I use AT&T, but I travel a lot to other countries, and want to use others SIMs on my iPhone.