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Jailbreak iOS 4.2.1 with GreenPois0n RC5 for Windows released

Discussion in 'iPhone OS Chat' started by Admin, Mar 30, 2011.

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  1. Admin Administrator

    How to Jailbreak iOS 4.2.1 with GreenPois0n RC5

    Warning: Do not upgrade to iOS 4.2.1 if you relay on an unlock. Ultrasn0w does not support the latest baseband yet.
    Step 1:
    Download GreenPois0n RC5 from the following url http://www.greenpois0n.com Click on Windows link to download. If that link is not working for you download from this Mirror.
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    Step 2:
    Save the zip file on your desktop.
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    Step 3:
    Extract by double click the downloaded gp_win_rc5_b2.zip file then drag the greenpois0n.exe file to the desktop. Double greenpois0n.exe to launch the application.
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    [IMG]
    Step 4:
    Power off and connect your iPhone, iPod touch or iPad with the PC. Now Click the large Prepare to Jailbreak(DFU) button
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    Step 5:
    GreenPois0n will instruct you to put your device into DFU mode.
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    Press and hold the sleep button (the power on button) for 2 seconds.
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    Continue holding Sleep button and also Press and hold Home for 10 seconds.
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    Release Sleep button but continue holding Home for 15 seconds.
    [IMG]
    Step 6:
    Now your device is in DFU mode. Click the Jailbreak button.
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    Step 7:
    Greenpois0n will now jailbreak your device
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    Step 8:
    Click the Quit button once the Jailbreaking is completed.
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    You’ll notice some verbose mode text scrolling on your device.
    Step 9:
    After restart you’ll notice a new Loader application on your Springboard. Touch its icon and launch it.
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    Step 10:
    Touch on Cydia then press the large Install Cydia button that appears.
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    Step 11:
    Once Cydia has installed successfully you can remove Loader by pressing the Options button then the large red Remove Loader.app button.
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    Step 12:
    Restart your device then run Cydia. Let it do all the necessary updates.
    [IMG]
    Congratulations, you have a jailbroken iOS 4.2.1 device.
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