Below are the steps on how to unlock your iPhone 4, iPhone 3GS / 3G so you can use it with any GSM carrier worldwide using UltraSn0w 1.2. This will work if you are on any of the following basebands (Modem Firmware) on your jailbroken iPhone: 04.26.08 05.11.07 05.12.01 05.13.04 06.15.00 01.59.00 Follow the steps [...]