As promised, ultrasn0w 1.0 unlock for iPhone 4 has been released. That’s the first iPhone 4 carrier unlock that enables you to use any sim you want with your iPhone. For those of you who are new to iPhone 4 unlock, you’d need to jailbreak iPhone 4 first before you go on to unlocking. If you want to unlock iPhone 3GS, you can use ultrasn0w 0.93 as well.

Ultrasn0w 1.0
A step by step guide will be up soon.