A tweet by MuscleNerd reveals that the Ultrasn0w unlocking software for the iPhone 3G
and the iPhone 3GS
, running iOS 4.2.1, is making good progress, and should be available this Sunday. As usual, your device needs to be jailbroken before applying the
unlocking tool, so have a look at this video tutorial
how to jailbreak your
iPhone, iPad or iPod touch.
Be careful not to do it prematurely before the unlock is out, though, since it updates the baseband, and will permanently reverse any prior unlocks on your iOS device. The tool will be valid for all basebands, but unlocking the iPhone 4 on iOS 4.2.1 is said to take some more time.