Untethered Jailbreak for iOS 4.2.1 with greenp0ison The site is still down but from what I’ve heard so far, the jailbreak seems to be pretty solid. At the moment, both the greenpois0n website and Cydia’s servers are getting crushed, but it should be back up tomorrow at the latest. There has been a jailbreak for 4.2.1 using RedSn0w, but its kind of a… Read More