Ultrasn0w Unlock for iOS 4.3.1 Released by Dev-Team

iPhone 4 users must take extra care while updating to iOS 4.3.1 as they need to prevent the baseband from upgrading

If you own an iPhone 4 or iPhone 3G/3GS that is not factory unlocked, you can install Ultrasn0w to use it with any carrier

support to basebands which could be unlocked earlier

Tap on the first result and you should see Ultrasn0w version

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Tags // iOS , Ultrasn0w , Install , DevT , Redsn0w , PwnageTool