As expected and, Sn0wbreeze 2.3b4 is released by the developer iH8sn0w. The best thing about the tool is that it fixes Ultrasn0w to unlock iPhone 4 and iPhone 3GS on iOS 4.3. Remember Ultrasn0w unlock was previously broken when your device is running the latest iOS 4.3 firmware.
It is important to note which baseband are using. Sn0wbreeze 2.3 beta 4 is COMPATIBLE with Ultrasn0w unlock for basebands 01.59.00 / 04.26.08 / 05.11.07 / 05.12.01 / 05.13.04 / 06.15.00.
DO NOT USE it for basebands 02.10.04 / 03.10.01 / 04.10.01 / 05.14.02 / 05.15.04.
According to the developer, upgrading your iPhone 3GS baseband to the 06.15.00 iPad baseband to unlock MAY cause you to lose your GPS. The latest sn0wbreeze 2.3 beta 4 also fixes minor GUI and iBooty bugs.
If you are unaware, Ultrasn0w Fixer was developer by msft_guy when Apple was releasing betas of iOS 4.3. After some time he made it open source. iH8sn0w manager to port Ultrasn0w Fixer on the latest iOS 4.3 and released the Ultrasn0w. Earlier he updated a video showing it in action.
Download Sn0wbeeze 2.3beta 4 for iPhone, iPod touch & iPad
HOW TO Guide: Unlock iOS 4.3 Ultrasn0w iPhone 4 & 3GS After Sn0wbreeze 2.3 Jailbreak
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