Here are our step-by-step tutorials that will guide you through all the process of untether jailbreaking iOS 5.1.1 with absinthe, redsn0w and sn0wbreeze:
UnTethered jailbreak iOS 5.1.1
UnTethered jailbreak iOS 5.0 / iOS 5.0.1:
Tethered jailbreak iOS 5.1:
UnTethered jailbreak iOS 5.0.1:
For iPhone 3G use this tutorial.
There is no unthethered jailbreak for new iPhone 3GS bootroms and iOS 4.2.1 yet, so you should stay at iOS 4.1.
Important: iPhone3GS users with old bootroms who want to go to 4.2.1 and unlock should not use this PwnageTool! Update to stock 4.2.1 first, then use new redsn0w to update your baseband.
Make a folder called “Pwnage” on the desktop. Download a couple of things: