Hey guys, I'm getting alot of mixed answers researching about this everywhere. Most of the stuff is outdated. So here's my situation: I have a iPhone 4 on 4.0.2 firmware with 1.59.00 firmware. I am with T-mobile so I want to unlock this iPhone 4. I hate gevy sim crap, I want to unlock using the original T-Mobile sim. So we are in year 2012, so is this possible to jailbreak and unlock this iPhone 4? If so using what? Thanks fellas!