After releasing RedSn0w 0.9.6 RC9, iPhone Dev Team also released Pwnage Tool 4.3 to jailbreak iOS 4.3.1 untethered using Custom Firmware. PwnageTool can jailbreak iOS 4.3.1 on iPhone 3GS / 4, iPad, iPod Touch 3G / 4G and Apple TV 2G.
PwnageTool 4.3 preserves baseband by ultraSn0w to unlock iPhone 3GS / 4.
Currently, this Pwnage Tool 4.3 is only for MacOSX and Windows users need to wait till iH8Sn0w releases the updated version of Sn0wbreeze for Windows.
As per iPhone Dev Team, The 4.3.1 untether works on all iDevices, except for iPad2. The reason is that iPad2 requires a bootrom or iBoot-level exploit to install and it is not susceptible to either SHAtter bootrom exploits or limera1n.
Devices supported by iOS 4.3.1 Untether
• iPhone 3GS
• iPhone 4 (GSM)
• iPod touch 3G / 4G
• AppleTV 2G (PwnageTool only for now)
Download Pwnage Tool 4.3 from torrent