Unlock iPhone 432 with Ultrasn0w 122 [Tutorial]

The iPhone Dev Team today has released an updated version of Ultrasn0w unlock to make it compatible with iOS 4.3.2 on iPhone 4 and 3GS, running on the old baseband.

Source:
http://www.redmondpie.com/unlock-iphone-4.3.2-with-ultrasn0w-1.2.2-tutorial/