GreenPois0n untethered jailbreak for iOS 4.2.1 published
The latest version of Greenpois0n has been released, offering Mac users with iOS 4.2.1-running devices an untethered jailbreak. With iOS 4.3 just around the corner, it may be a good time to take advantage of this, if jailbreaking is your thing.
As always, be sure to backup your device, and proceed at your own risk.
Article Via OS X Daily