How To: Jailbreak iPhone 4 / iPhone 3GS On iOS 4.1 With Greenpois0n (Windows)

It’s here and you’re probably jumping with joy. GreenPois0n is up and can be used to jailbreak iPhone 4, 3GS, iPod Touch 4G on iOS 4.1, and iPad on iOS 3.2.2, but there’s no unlock. If you rely on an unlock for iPhone, don’t update to iOS 4.1. If you already have, wait till November when Apple releases iOS 4.2 and then hopefully the iPhone Dev-Team would release the unlock. THIS ONLY WORKS FOR WINDOWS. You need a WI-FI or 3G connection for this to work (Cydia updates).

Follow this guide to jailbreak the iPhone 3GS and 4 on iOS 4.1:

STEP 1: Download Greenpois0n.

STEP 2: Connect your iPhone to the computer via USB, power off your iPhone and launch Greenpois0n jailbreak tool.

STEP 3: Click “Prepare to jailbreak” (DFU).

STEP 4: There will be a series of on-screen instructions, so follow everything you’re told to do.

STEP 5: Now your iPhone can be jailbroken. All you have to do is click on “Jailbreak”.

STEP 6: Your iPhone is now jailbroken and you can see a “Loader” icon on your iPhone’s SpringBoard.

STEP 7: Press “Loader” icon and “Install Cydia”.

STEP 8: After Cydia is installed, a window will prompt you: “Do you want to remove Loader from your device”. Click “Remove”.

STEP 9: Through a Wi-FI or 3G connection, launch Cydia, and installation files would be downloaded and automatically installed.

Now you’re running an iPhone 3GS or 4 jailbroken on iOS 4.1.

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  • ABU

    Worked like a charm. Thanks now i can you my 3GS as a phone and not as an ipod. Thanks a million.

  • Lee

    could not get it to work at all

  • Arsalan

    what seems to be the problem and which iphone are you using?

  • Anonymous

    I couldn’t get the Windows version to work, but the Mac version worked 1st try. For Windows, make sure you run it as Administrator.

  • ringofdeath

    tried 3 times followed instrutions and it just goes blank screen everytime and i have to restore it…help??
    (itouch 2g 4.1)

  • jessica

    Can someone help me I have been trying to do this for over a month and it will not work….HELP…..iPhone 8GB


    thankyou- greatly appreciated RESPECT ALWAYS ZED

  • Jaden

    Hello Jenesh,
    You will need to use this tool here, in order to jailbreak your iPhone 3G running iOS 4.0.1
    Greenpois0n only works with the iOS4.1 firmware.

  • Jadeneastonellett

    Hello Jenesh,
    You will need to use this tool here, in order to jailbreak your iPhone 3G running iOS 4.0.1
    Its called: LimeRa1n
    Greenpois0n only works with the iOS4.1 firmware unfortunately. Let me know if you need any more help.

  • Amar_kathir

    iphone4 i try to install green poison download complete sucessfully but i cant find aps in my phone, why? any one can tell me pls

  • Vaughn309

    my ipod does not work at all

  • hafiz

    hii, am having iphone 3gs with 4.1 locked with firmware 05.14.02, am not able to jail break..pls help…can i upgrade and jail break it..