Update iPhone 4 to iOS 4.1 Without Baseband Upgrade
Apple has released the iOS 4.1 which features a new baseband 2.10.4. If you update to iOS 4.1, you will lose the jailbreak and unlock. The latest Ultrasn0w 1.1-1 nor the downgrading back to iOS 4.0.x (with SHSH blobs) will not be able to unlock the iPhone 4. Notcom has found a way...