How to Unlock iPhone 3GS, 3G Using Ultrasn0w 1.2 on iOS 4.2.1

Ultrasn0w Unlock iPhone

The iPhone Dev Team has released ultrasn0w 1.2 which initiates carrier free unlock for iPhone 3GS and iPhone 3G on iOS 4.2.1 or iOS 4.1. After updating baseband to 06.15.00 using PwnageTool 4.1.3 for Mac and Redsn0w for Windows you can unlock your jailbroken iPhone 3G or iPhone 3GS using this updated Ultrasn0w 1.2.

Steps to Unlock iPhone 3GS, 3G Using Ultrasn0w on iOS 4.2.1:

For unlocking iPhone 3G/ 3GS you need to have a jailbroken iDevice. You can jailbreak iPhone 3G and iPhone 3GS using Redsn0w from here.

1) Download PwnageTool 4.1.3 for Mac and update the baseband to 06.15.00.  Redsn0w  for Windows users to update the baseband (using iOS 3.2.2 for iPad) will be available soon.

2) Now unlock using Ultrasn0w 1.2 from Cydia. Type and hit Add Source to add this repository. Select from the sources list and select ultrasn0w from the list of packages to install it.

Also Read: Enable Air Printing on Mac OS X 10.6.5 for iOS 4.2 iDevices

Ultrasn0w cydia install

3) Now reboot your iPhone 3G/ 3GS  on iOS 4.1 or iOS 4.2.1 to have an unlocked iDevice.

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