Unlock the iPhone 4 on iOS 4.0 and 4.0.1 using Ultrasn0w 1.0-1

iPhone Dev Team has just announced Ultrasn0w 1.0-1 tool to carrier unlock the jailbroken iPhone 4. Ultrasn0w 1.0-1 also can unlock iPhone 3G and 3GS on iOS 4, 4.0.1 and 3.x firmware.

This tool works for iPhone 4 with baseband 01.59 and also supports iPhone 3GS and 3G devices with 04.26.08,  05.11.07,  05.12.01 and  05.13.04 basebands.

Your iPhone must be jailbroken to use this unlocking tool. If you haven’t jailbreak it, it can be done by using the JailbreakeMe 2.0 (Star) tool [Guide]. Than just follow these simple steps.

Unlock the iPhone 4, 3GS and 3G on iOS 4.0 and 4.0.1 using Ultrasn0w 1.0-1.

1. first go to Cydia on your jailbroken iPhone device.

2. tap on the Manage and than on Sources button.

3. Touch on Edit and than on Add.

4. Than add this repo repo666.ultrasn0w.com and touch on Add Source. (in ultrasn0w, it’s number zero, not letter o)

5. When installation completed, search for Ultrasn0w 1.0-1 in Cydia and install it.

Watch the video for the Step by Step information

After this, your iPhone 4 should be carrier unlock and you can use and SIM service with device.