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How to Jailbreak iOS 4.1 on iPhone 4 & iPhone 3GS with GreenPois0n [Video Tutorial]

Chronic Dev-Team has recently released the GreenPois0n tool which now incorporates the bootrom hole used in Limera1n instead of SHAtter exploit. There is not much difference between the Limera1n and GreenPois0n as both uses the same exploit to jailbreak iOS 4.1 on iPhone 4 and iPhone 3GS (Old+New Bootrom). Below is a step-by-step guide to jailbreak iOS 4.1 on iPhone 4 and iPhone 3GS with GreenPois0n tool.

Note: Those who rely on an unlocked iPhone, do not upgrade to iOS 4.1 directly as it'll also upgrade your baseband which is yet to be unlocked with the upcoming version of Ultrasn0w tool. However you can use TinyUmbrella (Only for iPhone 4) to update iOS 4.1 without upgrading your baseband to 2.10.04.

Steps to Jailbreak iOS 4.1 on iPhone 4 & iPhone 3GS with GreenPois0n:

  1. Download GreenPois0n tool for Windows and Mac here.
  2. Make sure your iPhone 4 or iPhone 3GS is on stock iOS 4.1.
  3. Connect your iPhone to your computer with USB cable.
  4. Launch greenpois0n.exe and click on the "Prepare to Jailbreak (DFU)" button.
  5. GreenPois0n iOS 4.1 Jailbreak

  6. Now GreenPois0n will help you to put your device in DFU mode. Turn OFF your device completely and get ready to hold the sleep button.
  7. GreenPois0n iOS 4.1 Jailbreak

  8. Hold down the Power button on the top of your iPhone for 2 seconds.
  9. GreenPois0n iOS 4.1 Jailbreak

  10. While holding the Power button, press Home button for 10 seconds.
  11. GreenPois0n iOS 4.1 Jailbreak

  12. After 10 seconds, release the Power button but keep holding the Home button for 15 seconds.
  13. GreenPois0n iOS 4.1 Jailbreak

  14. Once GreenPois0n will detect your iPhone in DFU mode, you will see the Jailbreak! button. Click on it to start the jailbreaking process.
  15. GreenPois0n iOS 4.1 Jailbreak

  16. Wait while GreenPois0n jailbreaks your device. Don't do anything silly while jailbreak is being applied on your device.
  17. GreenPois0n iOS 4.1 Jailbreak

  18. Once done, click on the Quit button and your iPhone will restart automatically.
  19. GreenPois0n iOS 4.1 Jailbreak

  20. Thats it. Now you will see Loader app installed your iPhone. Use it to install Cydia and then launch Cydia to update its repositories.

GreenPois0n Video Tutorial:

Unlock iPhone 4, 3GS on iOS 4.1 with Ultrasn0w:

Once your iPhone is jailbroken, you can use latest version of Ultrasn0w to unlock your iPhone, provided that your iPhone baseband is not 05.14.02 / 2.10.04. You can find step-by-step guide to unlock your iPhone with Ultrasn0w 1-1-1 here.

Update1: How to Jailbreak iPod Touch 4G/3G iOS 4.1 & iPad iOS 3.2.2 with GreenPois0n?
Update2: Jailbreak iOS 4.1 on iPhone, iPod Touch, Apple TV & iPad with PwnageTool 4.1
Update3: Jailbreak iOS 4.1 on iPhone 4/3GS/3G, iPod Touch 4G/3G/2G & iPad with Redsn0w
Update4: Guide to Jailbreak iOS 4.1 & iOS 3.2.2 on Windows with Sn0wbreeze 2.1

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    aisha6 years ago

    Did the above and get the following when the lines of codes come up
    “error , no sucessful firmware do download after 600000 ms!!Giving up….”

    I have an iphone 3gs IOS 4.1 (new bootloader)

    KMerritt6 years ago

    If you jailbreak using this are you able to restore back to the factory settings if need be?

    Miun6 years ago

    Can it also unlock the baseband 05.14?

      Wolverine6 years ago

      Its a jailbreak tool, not the unlock for 05.14 baseband. Unlock for 05.14 baseband will be there within a month.