A couple of minutes after the discharge of PwnageTool 4.2 , iH8sn0w decided to make available Sn0wbreeze 2.2 to create custom firmware on Windows. Like PwnageTool 4.2, Sn0wbreeze 2.2 can have a custom firmware 4.2.1 iOS without updating the baseband provided that preserves the unlocked via ultrasn0w.
The highlight feature of Sn0wbreeze 2.2 is the new “Baseband Preservation Mode”. This new mode enables current iPhone 4, 3GS and 3G users to preserve their baseband while upgrading to iOS 4.2.1 so that they can unlock using existing version of Ultrasn0w.
Also new in Sn0wbreeze 2.2 is the ability to play Pac-Man game to keep you busy while the custom IPSW is being built for your iPhone, iPad or iPod touch , along with the ability to change boot logos, thanks to GreenPois0n RC5/6 exploit. Fix for iBooks is also included.
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Download iOS 4.2.1 for iPhone , iPad, iPod touch
Download .NET Framework three.5 (required to run Sn0wbreeze)