Here is a quick guide on how to unlock your iPhone 3G iOS 4.0.2 using UltraSn0w 1.1-1, it is quick and simple.
This unlock will only work with the Apple iPhone 3G, if you have already done this please let us know how you got on by send us your personal review and of course any problems you have encountered if any.
Thanks to the iPhone Download Blog they have a step-by-step guide, follow these instructions:
1) Using RedSn0w Jailbreak your iPhone 3G, 2) Go to Cydia and search for UltraSn0w. If it’s not there, you might have to add the following repo: repo666.ultrasn0w.com, 3) Install UltraSn0w, 4) Reboot your iPhone.
Hopefully if the above as worked you can now use your Apple iPhone 3G device with any network carrier, once again of you have done this please let us know how you got on.