ios 4.2.1 jailbreak


To jailbreak the latest ios 4.2.1 firmware on any device, go to the link below, download the software for your operating system and follow the on screen instructions.

As usual, if you want to stay jailbroken, do not update to 4.3 when it is released sometime in the next few days.

Also note that at present no unlock is available for this firmware at the time of writing.



Update: I have successfully jailbroken two devices using this method on windows7 and macOSX without any problems. The instructions are easy to follow.

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