The iPhone 4.2.1 jailbreak tool GreenPois0n has been updated to version RC6. This update brings support for the Apple TV and fixes emulators compatibility issues with GreenPois0n.

Since it came out last week, GreenPois0n has been updated several times, and can now also be used to jailbreak the Verizon iPhone. Although RedSn0w can also provide an untethered jailbreak, GreenPois0n still remains our recommended jailbreak for 4.2.1…

You can download GreenPoison RC6 for Mac and Windows from our iPhone downloads section.

If you’re going to give it a try, please let us know how it went for you.

  • tictoc

    Guys, I have jailbroken iphone 4.2.1 with rc6.1 no probs. Question that I have is what happens when apple updates its software eg. 4.3 is due to come up.

    Can you update ? If so, does that remove the jailbreak and you have to wait for a 4.3 jailbreak to be available. etc.

  • Asa

    I jailbroke my iphone 4 but the 4.2 version and it wont let me add the cydia.hackulo.us page to get installous4 whats going on??

  • hendrixxx

    @asa:

    It may just be down. try again later. It still works for me but I’m still on 3.1.3 OS.

    I really think it’s just down for now, just keep trying and check the spelling.

  • Andy

    How do i jailbreak my ipod touch 3g that is updated to 4.1.2 on my ipod touch?

  • kevin

    how do i jailbreak my i phone 4 . 16g . 4.3.1 ?