This update to the original iPhone adds 3G data, GPS, and a new shape on the back side. An updated OS supports third-party software, plus corporate email, sync, and VPN features. Other features ...

So basically, this version of ultrasn0w only works for iPhone 3G and 3GS owners running iOS 4.2.1 and willing to unlock their phones. The Dev-Team based this release on some code grabbed from the old ...