This step by step GreenPois0n guide and tutorial will show you how to jailbreak your iPhone 4.1 using GreenPois0n, the new jailbreak by Chronic Dev Team. This GreenPois0n guide will work for the iPhone 3GS, iPhone 4, iPad, iPod Touch 3G, and iPod Touch 4G.

GreenPois0n is is available for Windows, Mac, and Linux.

Although we encountered a few issues here and there, we were able to jailbreak our iPhone 4 successfully using greenpois0n. Once you get around a few hiccups, the process really isn’t all that difficult.

Check inside as we step through the jailbreak process with greenpois0n using a Windows machine. The steps are exactly the same no matter what platform you use.

Step 1: Download GreenPois0n and run it as an administrator.

Step 2: Power off your iPhone, and connect it to your PC.

Step 3: Walk through the steps to put your iPhone into DFU mode to prepare for jailbreak.

Step 4: Once you’re in DFU mode, click the ‘Jailbreak!’ button to jailbreak your iPhone.

Step 5: Now, just wait until the status bar shows complete, and your iPhone will reboot to the home screen.

Step 7: You should now have a new “Loader” icon on your springboard. Launch Loader. Select Cydia > Install Cydia.

Step 8: One Cydia has successfully been installed, you will be asked if you want to remove Loader. Hit “Remove” and your iPhone will automatically reboot.

Done! After your iPhone has rebooted, you will have a completely jailbroken iPhone with Cydia installed on your springboard.

Let us know how the process goes for you.

  • thewrecked

    well i believe i just bricked my ipad. lucky this doesnt cost money to use greenposion or i wouldve sued

    • Anonymous

      I don’t think you can really sue another person over your own stupidity and actions!

    • Steve Jobs

      I don’t think you can really sue another person over your own actions.

    • Steve Jobs


  • Raja

    My Iphone went to recovery mode by doing the Step3. I am forcing to upgrade to 4.2 when I try to restore it. I am not sure whether I need to upgrade to 4.2 . Not sure how to restore from my backup.

  • jm

    does this work on baseband 5.14.02? thanks in advance

  • azianpwnage23

    It actually worked

  • luckynumba77

    once my loader bar goes to the end it just never stops and the ‘connect to itunes’ thing appears…why wont it work? and @thewrecked, did u try to reset it by holding the 2 buttons again?

  • Eugene

    hi theres some problem i encounter i cant load my Loader at all
    p/s i waited almost 15mins just don seem to prom jailbreak completed

    izzit it wouldnt work for baseband 5.14.02

  • Crystal

    loader wont launch??

  • jm

    is there somebody here tried and successfully JB baseband 5.14.02? thanks

  • Gan

    when you do a full erase all setting what happen. does it erase the ios completely

  • secondgeneration

    wow! it works

  • J

    Every time I try to open the loader, it just instantly crashes!!!! Help!!!!

  • sunny

    its working, awesome, is this untethered? everything works with this, bluetooth etc?

  • Nick

    i downloaded RC6 for mac went through the steps.. i have the loader but it crashes everytime i open it any suggestions?

    • Zfliping

      Put your phone in dfu before tuning green poison that’s what I did and it worked

    • Zfliping

      Put your phone in dfu before runing green poison that’s what I did and it worked

  • girish

    does this JB work on 6.15.00 …??? thanks

  • Brian

    Hey guyz, i want to upgrade my 3GS to the latest OS and software since i got it ive not upgraded and now i want to upgrade to 4.2 . Im using the old 3.0.1. Pls advice

  • Candice

    It worked!! Thanks heaps!!

  • fotini

    i jailbreak iphone 4 but it hasnt a loader icon…does anyone know why?pls help me

  • Loader will not launch what do I do?

    • Monique

      i have the same problem.

  • kelz

    After jailbreaking using green poison rc 6.1 will i be able to restore to factory settings? firmware 4.2.1 iphone 4 Pls advise . Tks .

  • Jill

    Im having a hard time getting my iphone to get to DFU mode?..Does it usually take some time or am i doing something wrong?

  • Candice

    kelz, yes u can still restore!

  • Candice

    Jill, is ur phone updated to 4.2??

    • No, it’s 4.1

      • Candice

        Update first with iTunes and then try this??

      • Candice Campbell

        Update first to 4.2 and then try this jailbreak.

  • kelz

    Thanks candice . Actually i already jailbreak my iphone 4 n its was a success . Just thinking if one day i am gg to restore back in case i need to go back to the carrier, i suppose i make sure i dun update my itune . My iphone 3gs tend to be nt reg by apple the last time i jail break it n have to install an ip blocker in order to connect to itune again.

  • Renato

    loader wont launch??

  • Kelz

    Hi all , i had jailbroken my iphone 4 with green poison and i had just try to restore to factory settings but unknown error (11) occurs .. pls advise …..

  • Kelz

    Hi all, and tks candice. i tried deleting all my apps n restore , n it works like a miracle. Tks! But just a stupid question from me. Initially i using itunes and nw i intending to down load the itunes , and i intend to jail break using rc6.1 green poison and restore again to test , will e download of the latest itune affect restore ?

  • Alex

    Is there someone that is really familiar with jailbreaking who can email me and answer some questions? My email is

  • Kelz

    Well all, for iphone 4 ios 4.2.1 modem baseband 3.10.01 , MC model. Green poison rc 6.1 is useful! All tested. i tried to jail break n restore afew times n no problem at all. Cheers to green poison !

  • Brody

    I’ve got an iPhone 4 with version 4.2.1, I just jailbroke using the latest greenpoison, version 6.1, on my mac laptop. Halfway through the jailbreak process I got the “this application has quit unexpectedly” window, I clicked relaunch and greenpoison simply picked up where it left off and completed the process… much to my relief haha. Once my phone rebooted I ran the Loader program and installed Cydia, but when I try to open Cydia it is simply a dead link. I tried turning phone off and on, then tried doing a hard reset, both to no avail. My next course of action I suppose is to restore to the backup I made right before jailbreaking and then trying the whole process again? Anyone have a problem like this? I am a little nervous to try it again, I’d hate to brick my phone, is this totally safe? Any help is greatly appreciated!! Thanks in advance!

    • Kelz

      Hi Brody , i believed its fine . Just make sure ur phone is in DFU mode first n try again . Cheers !

  • Candice Campbell

    Ey guys I see heaps of peepz need help. I you have tried everything and not just want step by step instructions then you can email me at

  • Brody

    Thanks Kelz… at risk of sounding totally dense… what is DFU mode?

    Candice, I think I’ll take you up on that offer, I need some step by step instructions… in terms that even I can understand haha.

    Great forum, it’s nice to see so many people willing to help, and in a very timely fashion too!

  • Brody

    Now that I’ve read your post again Candice I feel even dumber haha, I won’t bug you for step by step instructions 😉

  • Brody

    OK now that, through the wonder of google, I have discovered what DFU mode is and how to enter it… do I have to restore my phone from the backup before attempting to re-jailbreak it?? Thanks again in advance!

  • Candice

    Brody, relax. Just plug your phone into itunes make sure its all up to date and the download greenp0sion and follow the instructions. Loader SHOULD Appear, open it download cydia and then uninstall loader and off you go!! Honestly let me know how you go 🙂

  • Brody

    Ok. Here it is again… I restored my phone from the backup I made from first jailbreak, then re-jailbroke following instructions precisely once more, only to get the same result. The Loader program is there, I open it, install Cydia, and when I try to open Cydia nothing happens… exactly the same as the first attempt. So I tried again this time putting the phone in DFU mode before running GP, which just skips the first steps of the program, with similar results… only this time Cydia was already installed for some reason… but still will not open. My iPhone is completely up to date, I have no idea what could be wrong or where to go from here. Help? Please!! 😀

  • Brody

    I uninstalled Loader and rebooted first as well, forgot that little detail 😉

  • Brody

    No ideas?

  • crazyman

    mines came to a black screen,and it stayed like that for hours what i do?

  • Migraine

    Seariously need some help guys… last night after sitting up until 01.30 in the morn I finally had to restore my phone and upgrade in iTunes to 4.3 on my 3GS as my phone was stuck in dfu mode after attempted jb using snowbreeze,irec and tinyumbrella to stop me from getting an error when restoring my custom Ipsw created by snowbreeze.Needless to say this didn’t work and ended up downloading greenpoison and trying through there which again did not work as it never rebooted and stayed in recovery mode,hence the restore and I basically just have one question and that is wether I can now just connect my iPhone 3GS 4.3 to my pc,run the latest greenpoison and have a jailbroken phone with Cydia installed.please assist as I am seriously wanting my iPhone to do things which it can only do when jailbroken.

  • Mike

    I can get my iPod into DFU mode but whenever I click to jailbreak it says jailbreak failed

  • Michelle

    The loader will not launch, please help!

  • david


    • The R

      Try holding home and sleep for bout 10 seconds or so. It will get it out of dfu mode.

  • Paul

    After installing on iPhone 4 with iOS 4.2.1 my phone, mail, Safari, and half the icons on my home screen disappeared. Can’t restore because Apple says “this IPSW is not compatible” or some such rot even though I’m sure I’m using the correct IPSW. Apple insists I update to 4.3.

  • red

    is there a jailbreak for ios 4.3.1 software

  • Bill Gates

    That’s right, fuck those apple fuckers!!

  • jb_newbie

    Does this works on iPod touch 4th gen?

  • saki

    i can’t get in DFU mode…
    i do everything as it says but doesnt work…

  • jim jones

    this software did not work for me… i have tried 30x or more… greenpois0n will not pick up on my DFU mode but my itunes does… i have posted this question on google nd looked for answers everywhere… with no luck, if any1 can help plz email me at, btw i have iphone 3g 4.2.1

  • Hailey


  • Opu

    Can ivunlock my phone after I jailbreak the phone with green poison?