Soon after PwnageTool 4.2 release by iPhone Dev-Team, iH8sn0w has released his much awaited tool for untethered iOS 4.2.1 jailbreak on all iDevices except iPhone 2G. Like PwnageTool, Sn0wbreeze 2.2 is incorporated with the same kernel based exploit used in GreenPois0n tool. Sn0wbreeze also comes with a fix for iBooks and Wifi related issues which will be available to GreenPois0n jailbreakers via Cydia package updates.
iDevices Supported by Sn0wbreeze 2.2:
So, if you have already jailbroken your iPhone, iPod Touch or iPad with GreenPois0n tool, you do not need to re-jailbreak it using PwnageTool 4.2 or Sn0wbreeze 2.2 as the fix for iBooks and Wifi related issues will be included in the upcoming Cydia package updates.
Sn0wbreeze is only helpful to those who are on Windows and rely on a unlocked iPhone. With Sn0wbreeze 2.2, you will be able to create iOS 4.2.1 custom IPSW on Windows, which on restore through iTunes will preserve the baseband of your iPhone. Once your iPhone has been jailbroken, you will be able to unlock it with the latest version of Ultrasn0w unlock tool.
Stay tuned while we update you with the step-by-step jailbreak instructions to use Sn0wbreeze 2.2 for untethered iOS 4.2.1 jailbreak.
Update#1: Sn0wbreeze 2.2 final has been released.
Update#2: Complete step-by-step guide to jailbreak iOS 4.2.1 on iPhone 4/3GS/3G, iPod Touch 4/3G and iPad using Sn0wbreeze 2.2 can be found here.
Update#3: Sn0wbreeze 2.2 R3 has been released. Now fix the iBooks related issues on all iDevices. Download here