Apple has only just released iPhone iOS 4.0.2 a few hours ago, but there are a few unlock and jailbreak guides that are already making the rounds. We have full details on them now to share with those who are interested.
Both guides come to us courtesy of RedmondPie, as they have included them on their website with easy step-by-step instructions to follow.
Firstly, you’ll need to jailbreak your device if you want to unlock it, and this can be achieved using the Redsn0w tool. You’ll find download links to all the relevant files you need, while there are also a few images to help you along the way if you get stuck.
Once you’ve jailbroken your device, you can then proceed to unlock your iPhone 4 using Ultrasn0w. A full guide on this can be seen over at RedmondPie below. Let us know if this works for you.