Sn0wbreeze also know as PwnageTool for Windows, this tool will untethered jailbreak iOS on iPhone 4G, iPhone 3GS / 3G, iPod touch 4G / 3G and iPad without basebande update , setup custom boot logos, activate your iPhone, set a root partition size, build custom firmware, install SSH, and more.
[Updated for iOS 6.0.1 - 6 - 5.1.1 ]
UPDATED with Sn0wbreeze 2.7.3
As expected, the current untethered jailbreak’s exploit has survived another firmware. The only exploit to survive several public firmwares has been updated to jailbreak today’s Apple TV update.