Early yesterday, iH8sn0w, the well-know iPhone hacker has just released Sn0wbreeze 2.2 (aka PwnageTool for Windows), Sn0wbreeaze 2.2 will allow you to jailbreak iOS 4.2.1 by creating custom firmware for Windows. This version is also based on Greenpois0n exploit.

Sn0wbreeze 2.2 r1 is complete and about to release, we have got some screenshots of this new version. As you know Sn0wbreeze 2.2 will bring untethered jailbreak for iOS 4.2.1 with custom firmware, as we reported you earlier Sn0wbreeze will allow you to jailbreak iOS 4.2.1 with preserving the old (unlockable) baseband to be able to unlock it with the existing version of ultrasn0w.

iH8snow, the developer behind Sn0wbreeze, iREB, and f0recast has just announced that he is working on a new version of Sn0wbreeze that will offer baseband preservation mode.