Unless you’ve been living under a rock for the past few hours, you know that the long awaited GreenPois0n untethered jailbreak for iOS 4.2.1 was finally released.

Maybe it’s just me, but I always seem to run into some sort of problem with missing or broken Cydia installations after a successful jailbreak.

To fix this issue I was able to install RedSn0w 0.9.6 on top of my GreenPois0n jailbreak with no ill results. By doing this you will still retain your untethered jailbreak, while gaining the necessary Cydia icon.

Check inside for the full video walkthrough…

Once you successfully jailbreak your iPhone with GreenPois0n using this tutorial, simply follow the instructions laid out in the video to install RedSn0w on top of your GreenPois0n installation in order to gain your missing Cydia icon.

Obviously there will be other ways to accomplish the same thing, but this was the way I was able to do so, and it was successful.

If you’re a RedSn0w user, you can probably do this in your sleep already. If you’re new to RedSn0w, you can find our tutorial for that tool here.

Both GreenPois0n and Redsn0w can be downloaded via our downloads section.

What do you think?

  • Sc

    dear jeff
    i installed this GP to my iphone 3gs 4.2.1 BB 6.15 with windows 7home edition.
    i still confused with the video, what the option that you take in redsnow for the first time after you open your IPSW there….??? (i use redsn0w_win_0.9.6rc8), then the 2nd u take install cydia isn’t??

    could you make the tutorial on text please….
    is it really working/compatible with ios 4.2.1 bb 06.15???

  • Ahmed

    Hey quick question..i downloaded grren poisom to my iphone 4 4.2.1… I got the loader screen to pop up and i was able to download cydia as well… But the outcome wasnt good..i cant open cydia at all..how can i fix this..the whole entire redsnow program confuses me?? Can u help please send me an eamil back asap!! And thanks

    • Jahan khan

      Open up redsnow follow onscreen, were it says install cydia, untick install cydia and tick only tether amd then let it tether, bingo u should get into cydia! Hope u understand my chinese lingo lol

    • kalbo

      same problem here..

  • Sarah

    I have the same problem that ahmed says she/he has so can you please post something or email me to fix this thing please

  • Tudy

    help me i need help , i had a limera1n jailbreack n after i deleted cidya n now dont works with greenp0ison please help me someone ocntact me at counter_arena08@yahoo.com

  • Apple

    i hv jailbreak iphone 4.2.1 sucessful. however, my startup icon combine apple icon and greenpoison icon.can i know hoe to fix it? when i restart my iphone, it prompt out the apple icon thn follow by greenpoison icon. can i know how to fix it?

  • Chi

    my problem is that cydia was not properly installed using loader .So when i again tried to install cydia from loader it says that cydia is already installed but i dont have an icon of cydia.i have rejailbroken using green poison but it still says that cydia is already installed and so i m really confused i dont have an icon of cydia but my i device thinks cydia is installed should i try redsnow .

    • gagan

      i have same prob plz tell me when u get solution

    • Angel

      download iphone explorer and delete cydia manually after that try loader again thats what i did

  • andrei

    i downloaded greenpoison went thru all the steps, but at the end the loader wasent on my app screen so i couldent download cydia..how can i fix this???i have a iphone 3gs 4.2.1


    These directions were phenomenal. Great tutorial !

  • i want to jail brake my ipod touch

  • i want this

  • Eric

    I have a iPhone 3G with iOS 4.2.1. Tried to jailbreak with greenpois0n numerous times. But after each attempt iPhone does not reboot by itself. Eventually I hard reboot it and it appears as if no jailbreak occurred (no loader, etc. available). What am I doing wrong?

  • Jason

    This works for my 3g Ipod Touch but Red Snow isn’t compatible with my ipod touch 2g. Is there another program like red snow that will install Cydia only?

  • Mo1973

    Hi I jb my phone got the loader icon nd downloaded cydia but now i am sitting with a blank white cydia icon tht cannot open can someone please assist me

  • Mo1973

    Hi I jb my phone got the loader icon nd downloaded cydia but now i am sitting with a blank white cydia icon tht cannot open can someone please assist me. Bham1973@yahoo.com

  • Jason

    If you used green poison , follow the video.

  • Raz0r

    Thank you so much. It worked like a charm. This is the 1st time, for me, Cydia wasnt installed properly. It would just respring the iPod when I tap on it. Now, not only is the GP untethered jailbreak still intact, so is the entire iPod. I didn’t have to save all the music, apps and everything else on my computer. (Pheww!) Cydia just worked like it was supposed to. (Woohoo!) You saved me a ton of time and headaches. Thanks.

  • Krishna

    Its done.
    To be frank this video made me to achieve it.
    A ton of credits to who ever did this tutorial.
    Thank you very much.

  • I can’t get it

  • pao_pao3

    THANK YOU for this short but very helpful video tutorial Jeff! Just what I needed now I have the Cydia app and will tinker with it all night..he he 🙂

  • iphone3gsios4.2.1

    Will this still unlock my iphone 3gs?

  • Tom

    I jailbroke my iPod 4G with greenpoison RC6 (4.2.1). I got Cydia and everything was great until I tried to uninstall and app I got from Cydia. I had already removed the “Loader” and so upon reboot I discovered I had no Cydia icon. I still have a couple of apps I bought off Cydia and they work, I just cant find the icon! I haven’t tried to restore yet but I have tried to re-jailbreak it with the same greenpoison. Any help would be appreciated

    • Varun

      I have exactly the same problem..Pls anybody can help me out to install cydia again..

    • Varun

      I have exactly the same problem.Pls anybody can help me out to install cydia again.

    • Varun

      I have exactly the same problem.Pls can anybody help me to reinstall cydia.

      • Hollywood

        I just HAPPENED upon this today. My icon was gone too and I’m gallad I fixed it. I had already downloaded SB SETTINGS. Go into the “more” tab in SB settings–system options–hide icon. If cydia shows “off”, turn it “on” and reboot. cydia should reappear on phone.

  • Riverfoot

    much simpler to just click on “Loader” and then download Cydia from there.

  • Liam

    Heyy..I jailbreak my itouch 3G 4.2.1. everything went great.I had the app to download cydia. I downloaded cydiaand every time I clicked on the cydia app it just crashed immediately. So I restored my iPod and I jailbroke again but this time nothing downloaded to my iPod after all the writing and stuff while jailbreaking.. This happened with all software..someone PLZZZZZ help!

  • yhk24

    Hey i Jb my ipod touch 4.2.1 with greenpoison it worked but den wen i was downloadin cydia thru the loader it reached 30 n den jus completed i got cydia icon but it doesnt start n i cant reinstall it too…. cant evn restore due to jb

  • Aaron

    I have recently jailbroken my ipt2g and it didn’t give me the loader app to install cydia.. What do I do??

    iPod Touch 2G MC Model

  • Aaron

    I have recently jailbroken my ipt2g and it didn’t give me the loader app to install cydia.. What do I do?? Also, it’s an mc model so greenpois0n is the only jailbreak for me. I’m running 4.2.1 if that helps answer or not.. Thanks for your time.

  • Xiero

    hii..u had told that u installed RedSn0w 0.9.6 on top of ur GreenPois0n …so my question is very simple..its WHAT RedSn0w 0.9.6 DID U INSTALL ON TOP OF GREENNPOISON????

    RedSn0w 0.9.6rc16:
    RedSn0w 0.9.6rc15:
    RedSn0w 0.9.6rc14:
    RedSn0w 0.9.6rc13:
    RedSn0w 0.9.6rc12:
    RedSn0w 0.9.6rc11:
    RedSn0w 0.9.6rc9:
    RedSn0w 0.9.7 beta 6:
    RedSn0w 0.9.7 beta 5:
    RedSn0w 0.9.6 RC8:
    RedSn0w 0.9.6 RC7:
    RedSn0w 0.9.7 beta 4:
    RedSn0w 0.9.7 beta 3:
    RedSn0w 0.9.7 beta 2:
    RedSn0w 0.9.7 beta 1:
    RedSn0w 0.9.6 beta 6:
    RedSn0w 0.9.6 beta 5:
    RedSn0w 0.9.6 beta 4:
    RedSn0w 0.9.6 beta 3:
    RedSn0w 0.9.6 beta 2:
    RedSn0w 0.9.6 beta 1

  • Er_ik

    hello can anyone help, im new to the jailbreak. i have cydia and installous. do i need the loader icon for future use? and how do i find the loader icon??? please help

  • im installing on windows and says “exploting with limera1n” its been like that for a long long time is it spouse to be like that?

  • Anonymous

    i have an iphone 4s with 5.0.1 software version on it.
    I jailbreaked with absynthe and everything was going well until i clicked the cydia icon.
    After i did that the iphone rebooted and when it got back to the main screen some icons were missing like the app store, the cydia icon and the camera.
    what should i do?

  • Hanson

    Does this redsnow support Mc models

  • xXpratoseXx

    anyone stuck on the exploiting screen, it means you need to update the jailbreak software you are using.

  • Aaron Joshua Angeles

    When it says the device takes the other steps but the screen is black and do nothing

  • keny

    i try jailbrek with greenpois0n. i try to install cydia with loader. but cydia not installp please some photo or video delete.