July 14, 2024
Chronic Dev-Team Releases Untethered Jailbreak for iOS 4.2.1 [Update]

Chronic Dev-Team Releases Untethered Jailbreak for iOS 4.2.1 [Update]

Posted February 3, 2011 at 10:47pm by iClarified
The Chronic Dev-Team has just released the latest version of Greenpois0n, which features an untethered jailbreak for iOS 4.2.1 without the need for SHSH blobs. The exploit they are using has already been patched in iOS 4.3.

Currently it is Mac only and is a beta release. A Windows version will be released "soon." You can download the jailbreak from here or here

You can find our tutorials on how to jailbreak with Greenpois0n here:
iPhone (Mac)

We have been unsuccessful in jailbreaking using Greenpois0n due to the following errors that present on the iPhone. We will let you know when we've been able to jailbreak successfully. Don't forget to check out the new iClarified app while you wait :)
Unable to find gBdevList
Unable to find fs_mount
Unable to find fs_unmount
Unable to find fs_load_file

Posixninja reports that these errors are normal. Presumably, the procedure shouldn't hang at this point.

Update 2:
Partial success... Make sure to do a clean restore and to keep holding the home button until Greenpois0n tells you it has completed. Unfortunately, now Cydia is not appearing in the Loader app. This may be because of server overload.

Update 3:
Success :) After numerous attempts at reloading Loader. Cydia has appeared. Servers are likely being slammed and download is taking forever.

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Chronic Dev-Team Releases Untethered Jailbreak for iOS 4.2.1 [Update]
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Comments (113)
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capitanloria - February 6, 2011 at 5:45pm
The Camera icon went out after jailbreak and once the iphone was up and running... any ideas???
capitanloria - February 12, 2011 at 1:55pm
any ideas somebody???
anony - February 6, 2011 at 9:40am
Great work Chronic Dev-Team. :) Does anyone know how to Remove Animated Boot Logo From Greenpois0n? Thanks.
john b
john b - February 6, 2011 at 7:21am
i just got the rick astley ikee wallpaper virus from years ago about a day after applying this jailbreak :(
john b
john b - February 6, 2011 at 9:05am
i meant after a day i did the jailbreak (did this yesterday) i suddenly got the rick astley wallpaper virus this evening. so don't forget to change your root and mobile passwords. found some instructions on how to remove it with google's help.
Tony L
Tony L - February 5, 2011 at 4:27am
Download the new greenpois0n rc5.2 http://www.iphonedownloadblog.com/iphone-downloads/ follow the same steps, it'll still give you the "unable to find" lines and when that happens press and hold the sleep button (as you're already holding the home button still) and new command lines start to run and the JB WILL WORK
Thanks - February 5, 2011 at 4:45pm
Thanks for the heads up on holding down the sleep button if the JB hangs up. It did the trick for me. But as for GP_2 i don't think it's any different.
Thanks - February 5, 2011 at 7:29pm
Forgot to add I still needed redsnow to add cydia after the jb
WLWO - February 6, 2011 at 10:13am
Awesome link! Helped me in my jb for my iPod 4! Thanks for the tips too! Now I can rest :D
Hank4653 - February 4, 2011 at 2:23pm
So after trying this 20 times looking at dozens of different guides I finally found out what the problem was ( unable to... gp init) there is a update for greenposion rc5 as soon as i tried rc5-2 it worked first time. So if you are getting those same errors and downloaded the app GP last night grab a new copy. Found the info at iphonedownloadblog.co*
rob54321 - February 5, 2011 at 8:56am
the greenpoison website is offline and i cant find the rc5-2 download! Any ideas of where else i could get it?
anamoana - February 4, 2011 at 1:19pm
I'm using windows, I feel i'm missing someting, I did clean restore, the I use the greenpoison and the green poison says it was complete , but the iphone 4 restarts and then nothing, no loader. Also does this work on iphone 3Gs with 4.2.1, I tried but it said jailbreak failed on the windows "green posion " program, What Am I missing? Thank you guys
calidude - February 4, 2011 at 1:40pm
this jailbreak is for MAC only not windows read the post
flashzoom - February 4, 2011 at 1:41pm
please read the posting clearly!!! it specificlly said Greenposi0n 4.2.1 JB is ONLY for MAC there is no Windows version yet. the Windows JB you got is older version!! will not work!!
Macsl21 - February 4, 2011 at 1:01pm
Success now on both my iPad and iPhone 4. The iPad I did just as instructed. It took forever of trying it over and over again every step of the way. The iPhone 4 took a long time, and I eventually gave up on the Loader app, and instead used redsn0w_mac_0.9.7b6, but just to install Cydia. It's a bit misleading because you have to download the ipsw, but when you go through RedSn0w, it will allow you to just install Cydia. Doing this saves a ton of time by not having to deal with Loader.
Aj - February 4, 2011 at 12:42pm
Hi I have tried many times with my iphone 4, It says jail break complete but when the phone starts, I don't see any loader icon? any tips.. Thanks
Macsl21 - February 4, 2011 at 1:05pm
You can't tell if it was successful by looking at your Mac, you need to see it say Complete on your Mac and then look at your iPhone and see a bunch of text being scrolled...wait...more text...wait...more text...and eventually it reboots. That's when it's successful, and you can either use the Loader app on the iPhone, or use RedSn0w to install Cydia.
iceblu121 - February 4, 2011 at 11:26am
wait so u have to wipe your phone out before you jailbreak it? thats not cool
ash - February 4, 2011 at 11:06am
easiest way, download greenpoison, run it and jailbreak your iphone 4. As for cydia, jailbreak again using redsnow, u'll get ur cydia. As for iPad, i did the other way round, it worked as well.
Dan - February 4, 2011 at 11:05am
I GOT MINE TO WORK ON IPAD. I had mine jailbroken through RedSnow so I tried jailbraking (like 10 times) with GreenPoison but no success. So i restored the iPad to a fresh iOS. Then GreenPoison went through the first time. After the jailbrake screen went into "plug into iTunes", so I used RecBoot to kick it out. It did and on the screen Loader showed up. I clicked loader and it looks as its downloading sources but then it just stops on a white screen. So I RedSnow it and got Cydia installed. Its now UNTHETHERED Jailbrake. I hope it helps. GOOD LUCH GUYS
Pancho_Villa - February 4, 2011 at 8:24am
http://www.greenpois0n.com/ is offline, can anybody get the site back up?
iranipod - February 4, 2011 at 7:17am
i installed loader by holding home bottom in the end of dfu mode then for several times trying finally cydia appears and it downloads after 30-40 % cydia crashed
abracadabra - February 4, 2011 at 6:18am
greenpoison rc 5 doesn't work on Mac OS X 10.5.8. any solution?
john - February 4, 2011 at 5:56pm
yes, buy snow leopard.
Shane - February 4, 2011 at 6:34pm
Try putting the GP app straight on the desktop and launch it. Worked for me!
Stevo - February 4, 2011 at 5:36am
I FINALLY HAVE IT WORKING! I was able to install the jailbreak without too much difficulty, but I could not get the Loader to install Cydia. After 20 or 30 attempts, I was finally able to get the Loader to install Cydia to 65%. However, at 65% the download stopped. Cydia was on my home screen, but when I tapped on it, it would not open. What I finally did was follow the instructions (here: http://www.technonix.com/2010/11/download-redsn0wredsnow-0-9-6b4-to-jailbreak-ios-4-2-1/) to download Redsn0w. I DID NOT wipe the phone, I simply installed the redsn0w jailbreak over the greenpois0n. Redsn0w successfully installed Cydia. The result is a UNTETHERED jailbreak!!! Hope this helps!
stevo - February 4, 2011 at 5:38am
BTW, this was for my 3G IPad.
joey90 - February 4, 2011 at 7:39am
Work for me on iPhone 4, untethered, cydia working, bb 01.59.00, untrasn0w unlocked!
Asa - February 4, 2011 at 10:50am
Its also worked perfect for me aswell! thanks! I did it on an iPhone 4
Jimmy - February 4, 2011 at 5:23am
I've done a clean restore...i've held onto the home button but the same error occurs. How long does it take for the scroll texts to appear on the iphone 4 after the jailbreak is complete? it does say greenpois0n initialized but it just sits there? am i just suppose to wait for it to start or do i just try again? i've honestly tried it for 2 hours...any advice?
Chahlie - February 4, 2011 at 5:27am
Jimmy- i know its a pain but if it did not work, turn off your phone and try again. I literally must had tried 20 fricken times! :P
Jimmy - February 4, 2011 at 5:29am
Do i have to restart the whole phone or just the software? lol i just rerun and software and jailbreak over and over again.
Chahlie - February 4, 2011 at 5:33am
once it hangs up. Press power button and the phone should restart. Then do it all over again with greenpois0n.
Jimmy - February 4, 2011 at 5:45am
IT FINALLY WORKED! ! ! ! after countless hours and tries....Here's my advice to everyone who has this problem like i did. RESTART YOUR MAC....i tried to restart the phone so many times...and the one time i decided to restart my mac...it works on the first try. Good luck to the rest of you, now i attempt to install cydia.
daveychan - February 4, 2011 at 5:01am
Can anyone confirm success on the AppleTV 2? Please and thanks!
Erik - February 4, 2011 at 5:07am
I tried, did not work. And according to several twitter feeds, the apple tv is not yet supported. If anyone gets it to work let us know:)!
davy1shoe - February 4, 2011 at 7:16am
I couldnt get apple tv to work aswell. Guess we have to wait a little longer.
Danny - February 4, 2011 at 8:41am
Would like to know also if you can jailbreak the Apple TV 2nd Gen with this jailbreak. Hope someone can tell
Macsl21 - February 4, 2011 at 4:00am
Success on my iPad!!! Lots of retrying, waiting, retrying...
turkeybabe - February 4, 2011 at 3:41am
If JB, can I do an unlock. Currently running 5.15.04 baseband, 3gs, 4.2.1 firmware
calidude - February 4, 2011 at 4:05am
you can update ur baseband to ipad's baseband using redsn0w and then use the ultrasnow to unlock it
turkeybabe - February 4, 2011 at 4:11am
But I want an unteethered jb, so why would I run that? Would't I want to run gp? Read elsewhere that if redsn0w jb, then run gp; all is good to go to unlock. Is that right? Did they fix the gps issues w/ redsn0w?
Moeen - February 4, 2011 at 3:31am
Loader.app don't show up!!!
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