Sn0wbreeze is an alternative to PwnageTool for Mac which allows you to create custom firmware files
without the upgraded baseband. The highlight feature of Sn0wbreeze 2.2 is going to be a new “Baseband Preservation Mode”. This new mode will enable 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. There is no ETA given for Sn0wbreeze 2.2. We will of course keep you updated as soon as
we know more about it. Stay tuned !