Download Sn0wbreeze 2.9.3 to Create Custom iOS 5.1 Firmware
Ih8sn0w popular iPhone dev behind Sn0wbreeze jailbreak tool has released an update to sn0wbreeze to support jailbreak on iOS 5.1. The Sn0wbreeze 2.9.3 brings tethered iOS 5.1 jailbreak to iPhone 4, iPhone 3GS, iPod Touch 4G, 3G, iPad 1 and Apple TV 2. The good thing about Sn0wbreeze jailbreak tool is ability to create custom firmware to preserver baseband to retain ultrasn0w unlock.
Sn0wbreeze 2.9.3 is good alternative to Redsn0w 0.9.10b6 iOS 5.1 tethered jailbreak tool, though you can still create custom firmware with Redsn0w but Sn0wbreeze can come handy when Redsn0w fails to work properly on your Windows machine.