iOS 4.2.1 has been released for a while now, and up until this weekend, there wasn’t a good and practical jailbreak for it. Sure RedSn0w did the trick but since it was a tethered jailbreak, it wasn’t very convenient.

Then came RedSn0w untethered jailbreak, which was better than its predecessor, but still wasn’t satisfying to most of us. Finally the Chronic Dev Team updated GreenPois0n, which brings a safe and reliable untethered jailbreak for iPhone iOS 4.2.1

How to Jailbreak iOS 4.2.1?

Should there be a new method to jailbreak iPhone 4.2.1, we will post it here and in our jailbreak section, but for the time being, GreenPois0n is your best bet.