Untethered Jailbreak 4.2.1 iPhone with Greenpois0n Untethered RC5-2 (Windows Guide)

Untethered Jailbreak 4.2.1 iPhone is now possible from Windows by Greenpois0n RC5-2 . Then the manual :
Yesterday I mentioned it : The version for Windows of GreenPois0n , the tool that allows you to Jailbreak Untethered devices to IOS 4.2.1 directly, is finally available for download. In this article we offer a complete guide on how to use it.
Warnings:It is highly recommended to restore