For all those people who have been trying hard to jailbreak their own iDevice then this is the time when they can be relief-ed as the jailbreak for the iOS 4.2.1 is finally available! all those people who have been working at Chronic Dev properly configured this and named this untethered jailbreak as “Greenpois0n”.
This is going to enable you to easily jailbreak your iDevice and for this you do not even need to connect it to your system! moreover, if for some reason you are required to reboot your gadget then go right ahead as you will not jailbreak it again and again. it is fully compatible with Mac, Linux, as well as with Windows, nevertheless, ‘Engadget’ considers that it was actually ‘rushed’ so you need to be warned!