Go ahead and follow this if you have a jailbroken iPhone 3G (Firmware below 2.2.1) and don’t want to mess around with the unlocking tools for 2.2.1 firmware.
Follow the following steps for both Windows and Mac Operating systems :
1) 2.2.1 Firmware from Apple iPhone 3G updates the baseband to 2.30 disabling the software unlock.
2) Make sure you have jailbroken your iPhone 3G Firmware below 2.2.1 using QuickPwn 2.2.
3) Now,if you have access to a Mac, feel free to download Pwnage 2.2.5 and build a custom firmware. Windows users might want …

UPDATE : No more tweaking with sec packs and command line hackery! A sit-back-relax- and-let-it-do-its-magic guide is released 🙂 It is so easy a 6th grader can do it!! Unlock iPhone 16GB /1.1.3 OTB/ 1.1.2 OTB 🙂
What took iPhone Devs months took GeoHot hours to find a true Unlock! It is not based on JerrySim baseband downgrade method but a lot more straightforward!! GeoHot hints that this can be applied to 1.1.3 OTB iPhones too, so hold your breath! Come Sunday and everyone can flash their iPhones with …