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Chronic Dev Team has already released Windows version of GreenPois0n RC5 iOS 4.2.1 untethered jailbreak for iPhone, iPad and iPod touch. It allows users to perform an untethered jailbreak on iOS 4.2.1 devices. This release works to jailbreak all iPhone, iPod touch, iPad models. Here is the step by step guide for Windows users to apply untethered jailbreak on iOS 4.2.1 devices while using Greenpoison RC5. Greenpois0n Windows version jailbreaks all idevices except Apple TV2, which will supported in the next update.

Note: As GreenPois0n RC5 does not cook your custom .ipsw that means it is impossible to unlock your device after you jailbreak it using GreenPois0n. If your device rely on an unlock it is recommended to wait until Redsn0w or Sn0wbreeze release it’s untether version or you can update to iOS 4.2.1 without upgrading your baseband by using TinyUmbrella. Start TSS Server->Start iTunes->Plug in your iPhone->Restore 4.2.1->Error 1013->Put phone into DFU Mode->Launch Greenpois0n for Mac only.

Below are the instructions on how to Jailbreak iOS 4.2.1 untethered on iPhone 4, 3GS, iPod Touch 2G, 3G, 4G and Apple TV using GreenPois0n RC5 on Windows.

Step 1: Back up your iPhone / iPad / iPod touch using iTunes.

Step 2: Download Greenpois0n for Windows.

Step 3: Now save your required download to any location.

Step 4: Extract the GreenPois0n tool archive on desktop and double click on greenpois0n to launch.

Step 5: Click on the button “Prepare to Jailbreak (DFU)”

Step 6: Greenpois0n will display the instructions to put your device into DFU mode.

* Press and hold the sleep button for 2 seconds
* While holding Sleep button, press and hold Home button for 10 seconds
* Release the Sleep button but continue holding Home button for 15 seconds

Step 7: Once your iPhone is in DFU mode, click the “Jailbreak” button.

Step 8: Greenpoison will now jailbreak your device.

Step 9 (i): After a successful jailbreak, your device will restart and you will notice a new “Loader” app in Springboard. Launch it and select Cydia to install it.

(ii): If you are unable to install Cydia or you are on unsupported carrier and stuck at Emergency Mode, use Redsn0w to install Cydia and to hacktivate your device.

That’s it.

Thanks

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GreenPois0n RC6 for Apple TV 2G To Bring Untethered 4.2.1 Jailbreak

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  On February 6, 2011(5 years, 3 months ago.)

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14 Responses

  1. Download GreenPois0n RC5 iOS 4.2.1 Untethered Jailbreak for Windows | TheTechJournal.com Says:

    […] Jailbreak iOS 4.2.1 with Greenpoison RC5 Windows on iPhone, iPad and iPod Touch[How To] […]

    Posted on February 6th, 2011 at 1:16 PM

  2. Enable FaceTime On The iPad Running iOS 4.2.1[How To] | TheTechJournal.com Says:

    […] running 4.2.1 (works on untethered and tethered) ( untethered jailbreaking tutorial – Mac and Windows […]

    Posted on February 7th, 2011 at 10:51 AM

  3. Fabel Says:

    Now i do the instructions but it says try again….

    Posted on March 15th, 2011 at 4:03 PM

  4. Sferia82 Says:

    how i can to restore iphone 4 ios 4.2.1 after greenpoison? i want official ios and later i will make greenpoison but itunes say error…. thank you

    Posted on March 18th, 2011 at 12:32 PM

  5. Ryuk Joel Addams Azryel Says:

    * Press and hold the sleep button for 2 seconds
    * Keep holding Sleep button, and Home button for 10 seconds
    * Release the Sleep button but continue holding Home button for 15 seconds

    Posted on March 29th, 2011 at 12:15 PM

  6. Ryuk Joel Addams Azryel Says:

    anybody have RedSnow?

    Posted on March 29th, 2011 at 12:24 PM

  7. Ryuk Joel Addams Azryel Says:

    I can’t find RedSnow!

    Posted on March 29th, 2011 at 12:24 PM

  8. Darrenhann9 Says:

    Hi I was wondering if greenpois0n is safe to jb. Also how long does it roughly take for gp to work. Thanks.

    Posted on April 20th, 2011 at 11:42 AM

  9. Lilj69 Says:

    Hi what is meant by relying on an unlock? Does it mean a if you use a sim lock code?

    Posted on April 26th, 2011 at 9:18 PM

  10. Iphone4freak Says:

    I have greenpoison on my iPhone 4 but I downloaded some stupid widget and my jailbreak is on safe mode all the time. I restart my phone but no luck in exiting safe mode. I uninstalled the widget and I still experiencing the same issue.

    Posted on June 27th, 2011 at 6:12 PM

  11. Andre Says:

    I dunno m gonna give it a try

    Posted on July 14th, 2011 at 7:43 AM

  12. Nemi32723 Says:

    what jailbreak can I use for model MB702LL?

    Posted on August 13th, 2011 at 3:44 PM

  13. mark Says:

    i reset my iphone 3 that was already jail broken because i gave my phone to a friend but now it boot up.

    Posted on October 2nd, 2012 at 3:49 AM

  14. mark Says:

    *won’t boot up!

    Posted on October 2nd, 2012 at 3:50 AM

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