HOW TO UPGRADE YOUR IPHONE 4 IPHONE 3GS TO IOS 5 1 WITHOUT UPDATING
YOUR BASEBAND ON WINDOWS
HOW TO UPGRADE YOUR IPHONE 4 IPHONE 3GS TO IOS 5 1 WITHOUT UPDATING YOUR BASEBAND ON WINDOWS
In this article we will explain how to upgrade your iPhone 4, iPhone 3GS to iOS 5.1 without upgrading your baseband on Windows. This will allow you to unlock your iPhone since you would be on a supported baseband.