I am getting a new 4S tomorrow. Selling my old 4 to help with the costs. Currently running the original 4.0 firmware as well as the original 01.59.00 baseband. Phone is currently jailbroken. Never bothered to unlock the phone because I use AT&T and never had to. Can I please get the easiest unlock method to get that out of the way? Also need to clear the phone of all personal data and such what is the easiest way to do this without messing up my firmware and baseband? Thanks in advance!