Tutorial: Untether iOS 4.2.1 Jailbreak

Greenpois0n was just updated to untether all devices on iOS 4.2.1.  Untethered means that you no longer have to hook your iDevice up to the computer to boot with a jailbreak. GreenPois0n is very easy to use but some people request tutorials so here we go.  Please note that this jailbreak is for firmware 4.2.1.  […]