Untethered iOS 4.2.1 jailbreak by Chronic iPhone dev-team is now available for download. GreenPois0n RC5, the new tool currently supports Macintosh computers, and it could be used to jailbreak iPhone 4, iPhone 3G S, iPod Touch and iPad models with iOS 4.2.1. The process is much simple when compared to that we use in Redsn0w 0.9.6 b4 tethered and Redsn0w 0.9.7b1 untethered … [Read more...] about Untethered iOS 4.2.1 jailbreak using GreenPois0n RC5