Preserve Baseband and Jailbreak iPhone 4S/4/3GS

Jailbreak iPhone 4S/4/3GS -Preserve Baseband
Now you can preserve the baseband, while the iPhone jailbreak the device. That way you do not face problems opening the device. You can update your iPhone 3G firmware and the iPhone 4s / 4. Using redsn0w 0.9.9b6, you can keep your iPhone's baseband. The redsn0w is a version of Mac OS X only. If you're using Windows, you can use SnowBreeze v2.8b8.