sn0wbreeze 2.5 released by iH8sn0w can now be used to carry out iOS 4.3.1 untethered jailbreak by creating custom firmware. Sn0wbreeze 2.5 allows you to preserver your unlockable baseband to be unlock with ultrasn0w. The guide below will help you to Jailbreak any iOS 4.3.1 device and How to unlock and fix Ultrasn0w on iOS 4.3.1 .
Today Greenpois0n released for windows. I know there is somebody have Have hackvision or lock iPhone and want iOS 4.2.1 untethered jailbreak. There is the solution.