Untethered Jailbreak for 4.2.1

Chronic Dev Team has just released an untethered Greenpois0n jailbreak for iOS 4.2.1. They have incorporated an animated apple boot logo in their jailbreak as well. I have tested it myself and one of the best things about it is if your iDevice was already jailbroken, you can keep your jailbreak apps without having to redownload everything.

Download Greenpois0n RC5