YouTube - How To Unlock The IPhone 4 Using UltraSn0w (4.0 4.0...


Uploaded on January 03, 2011 by Garrisonroberto...

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This video tutorial shows you how to unlock any iPhone on iOS4 (4.0/4.0.1 firmware) using Ultrasn0w. This will unlock the iPhone 4, iPhone 3GS, and iPhone 3G on firmware 4.0 and 4.0.1.

Ultrasn0w source:

If you have not already jailbroken your iPhone on 4.0/4.0.1, then you need to use to jailbreak your iPhone first. Watch the 4.0/4.0.1 jailbreak video

ULTRASN0W UNLOCKERS BEWARE!! ULTRASN0W UNLOCKERS BEWARE!! The biggest mistake you can make (and it is a big one!) is lettings iTunes restore to the official IPSW — you'll lose the unlock and won't be able to go back! You must use Option-Restore, not just the Restore button by itself. Then navigate to your custom IPSW — not to the stock one! If you accidentally started a restore to the official IPSW, unplug your iPhone immediately before the restore gets to the "Updating Firmware" step!
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