How to Jailbreak Your iPhone 3GS, iPhone 4 Using Greenp0ison


New Member
Jan 15, 2011
These are instructions on how to jailbreak your iPhone 3GS and iPhone 4 using Greenpois0n for Windows. Greenpois0n supports the iOS 4.1 and iOS 4.2.1 firmware. Use Limera1n if you want to jailbreak iOS 4.0, iOS 4.0.1, iOS 4.0.2.

Remember: Do not update to iOS 4.2.1 if you need the unlock. Ultrasn0w does not support that baseband yet. The only exception is the iPhone 4. You can update to iOS 4.2.1 without upgrading your baseband by following this tutorial.

Step One

Open your web browser of choice and navigate to Click the Windows link at the bottom of the screen.

Step Two

When prompted save the download to your desktop

Step Three

Double click the downloaded file then drag the greenpois0n.exe file to the desktop. Double greenpois0n.exe from the desktop to launch the application

Step Four

Power off your iPhone then click the large Prepare to Jailbreak (DFU) button

Step Five

You will now be instructed on how to place your iPhone into DFU mode. You can get help with this here.

You will be asked to press and hold the sleep button for 2 seconds.

Continue holding sleep; press and hold home for 10 seconds.

Release sleep button; continue holding home for 15 seconds.

Step Six

Once your iPhone is successfully in DFU mode you may click the Jailbreak button.

Step Seven

Greenpois0n will now jailbreak your device

Step Eight

Click the Quit button once the software application has completed

You'll notice some verbose mode text scrolling on your device.
Step Nine

After the iPhone restarts you'll notice a new Loader application on your Springboard. Press to launch it.

Step Ten

Press to select Cydia then press the large Install Cydia button that appears.

Step Eleven

Once Cydia has installed successfully you can remove Loader by pressing the Options button then the large red Remove button.

Step Twelve

Restart your iPhone then run Cydia. Let it do all the necessary updates then follow our Unlock tutorial if possible for your device.

any questions ?


La Patróna
Aug 18, 2010
New Zealand
Re: How to Jailbreak Your iPhone 3GS, iPhone 4 Using Greenp0

<r>Post moved in correct section <E>:D</E><br/>
Thanks for post! :thumbup:</r>


New Member
May 8, 2012
Re: How to Jailbreak Your iPhone 3GS, iPhone 4 Using Greenp0

<t>I try this and it keeps saying device not supported</t>


Well-Known Member
Aug 22, 2010
Re: How to Jailbreak Your iPhone 3GS, iPhone 4 Using Greenp0

<t>You may have iPhone 3, not 3GS or 4.</t>


New Member
Jan 19, 2013
Re: How to Jailbreak Your iPhone 3GS, iPhone 4 Using Greenp0

<t>We need wify or not, to install greenp0 please explain<br/>
I am Getting Error that its not able to download, i don't have wify so how to install Greenp0 are there any other ways</t>


New Member
Mar 29, 2017
How to Jailbreak Iphone 5

Thank you for the tips. But as you know the system is getting update rapidly and really if there i any way to jailbreak 5 or later than, please share.<br/>
Awaiting for your next touch.<br/>
Take care</t>


New Member
Apr 6, 2017
How can In install ios 8 apps on my ios 7 iPhone 4, any solutions? I really need instagram, fb messenger WhatsApp messenger and facebook...


Nov 2, 2018
bsp How to Jailbreak Your iPhone 3GS iPhone 4 Using Greenp0ison

<t>bro i opend NTOSKRNL.EX_ with winrar and i extract NTOSKRNL<br/>
now i edited it <br/>
but i am unable to again make it in .EX_ file<br/>
how to do it?</t>

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