Chronic-Dev team has released Greenpois0n tool that will allow users to jailbreak their iOS 4.2.1 running devices. This jailbreak solution is an untethered one, which means the jailbreak will still be active even after a user restarts his iDevice. However, users planning to unlock the device are warned to stay away as you can lose the unlocking after the jailbreak.
The tool is available now for Mac and Windows.
windows?????…..whenever!!!!…….. i,ve given up relying on “SOON” it will come when it comes…..been soon since release 1 …I,m sure it will be worth it if i,m not too old to use it by then …lol…….just have to be satisfied with what I got …..