Ultrasn0w 1.0-1 Unlock for iOS 4.0.1 on iPhone 4, iPhone 3GS and iPhone 3G is released by iPhone Dev Team. Ultrasn0w 1.0-1 will work with baseband 01.59.00 for iPhone 4 and basebands 04.26.08, .05.11.07, 05.12.01, and 05.13.04 for iPhone 3G and 3GS.

As reported earlier, Planetbeing and Musclenerd were testing the unlock tool ultrasn0w. Before unlocking your iPhone your must first jailbreak it using JailbreakMe. Now, you can use any operator for your iPhone after unlocking it with ultrasn0w.
You might also like to check out:
- Guide for how to Jailbreak 4, iPhone 3GS, 3G on iOS 4 / 4.0.1, iPod Touch on iOS 4, and iPad on iOS 3.2.1using JailbreakMe 2.0
- Jailbreak iPhone 4, 3GS, 3G on iOS 4 / 4.0.1 and iPad on iOS 3.2.1 using JailbreakMe 2.0 Released by Comex from iPhone Dev Team
- Unlock iPhone 4 on iOS 4.0.1 with Ultrasn0w
Related posts:
- Ultrasn0w 1.0-1 Unlock for iPhone 4, iPhone 3G, iPhone 3GS on iOS 4.0.1/4.0 Releasing very soon!
- Ultrasn0w Unlock for iPhone 4 on iOS 4.0.1 to be Released in couple of Hours!
- Jailbreak iPhone 4, 3GS, 3G on iOS 4 / 4.0.1 and iPad on iOS 3.2.1 using “JailbreakMe 2.0″ Released by Comex from iPhone Dev Team!
- iPhone 4 unlock with Ultrasn0w on iOS 4.0.1/4.1
- How to unlock iPhone 3G/3GS with iOS 4 using Ultrasn0w 0.92.1