Chronic Dev Team unleashes greenpois0n, untethered jb for iOS 4.2.1

[+Frank B. Subscriber²]

Chronic Dev Team unleashes greenpois0n, untethered jailbreak for iOS 4.2.1

It's finally here, folks. The Chronic Dev Team has put out the latest version of greenpois0n that allows you to free your iDevice running 4.2.1. What's different about this jailbreak? Glad you asked. This time 'round, the program will let you perform an untethered jailbreak -- you can finally reboot the device without having to re-jailbreak. Be warned though -- this build was rushed out and we haven't tested any devices on our end. At the time of this writing, the software is only available for Mac. Oh, and unlockers, don't update to 4.2.1 if you plan on swapping sim cards in the future. Hit the source link to get started.

Source: Engadget

Link: greenpois0n website

[thealexweb]

Does this work with the iPhone 3GS running iOS 4.2.1 with the new bootroom, usually most jailbreaks can't crack it, only the 3GS with the old bootrom.

[+John. Subscriber¹]

Reports are that it doesn't work on Mac using a standard install. To get round this, install from terminal using sudo open greepois0n.app, and hold the home button down throughout the device.

On mine, it didn't install Cydia as the loader was blanking out after install. I used redsnow to just add the cydia package. This could probable be sone via SSH.

Good release, and thanks to everyone at the Chronic team.

[DigitalE]

Aside from a few hiccups, it worked pretty well. Got my iPhone 4 updated from 4.1 to 4.2.1 in about 20 minutes, and I was able to preserve the 1.59.00 baseband so I can still unlock!

[+Frank B. Subscriber²]

greenpois0n is now also available for Windows:

Greenpois0n untethered jailbreak for iOS 4.2.1 comes to Windows

It's been a painful two days, hasn't it? If you're a Windows user looking for an untethered jailbreak for your iDevice, the answer is most certainly "yes." The Chronic Dev Team has just let loose the greenpois0n untethered jailbreak for iOS 4.2.1, but unlike the build released 48 hours ago, this one's meant for Wintel boxes. The team's site seems to be down at the moment (shocker!), but there's a download mirror linked below if you just can't wait to get going. As always, we'd caution you to back up your iPad, iPod touch or iPhone before doing the deed, and since it's the first of its kind (for this version of iOS, anyway), we'd be ready to see a few bugs along the way. Minor details, we know.

Source: Engadget

Link: greenpois0n website

Download: greenpois0n for Windows

[UN1X]

About to try this I've been pulling my hair out waiting for it! (Windows Version on an Ipod Touch 4G 4.2.1)

Let you all know how it goes

EDIT: Couldn't have gone any smoother. Cydia installed cleanly as well. THANK YOU CHRONIC-DEV :D

[krishna]

what does untethered mean here? :wacko:

[Dinggus]

Untethered means every time your phone reboots, you don't need it to be plugged into your computer to make it fully start back up. It'll keep the jailbreak every reboot.

Tethered means every time you reboot your phone, it needs to be hooked up to your computer so you can keep your jailbreak.

[Ruciz]

what does untethered mean here? :wacko:

Its stored to the Flash/NAND of the device and not loaded into RAM which is lost on reboot.

Essentially, once jailbroken theres no screwing around - it will be jailbroken every time the device reloads the OS.

[krishna]

Essentially, once jailbroken theres no screwing around - it will be jailbroken every time the device reloads the OS.

Pardon my ignorance doesn't redsnow/similar ones do the same?

[Wanderermy]

Any info on unlock?

[betadan]

Pardon my ignorance doesn't redsnow/similar ones do the same?

For some devices yes. For example an iPad with OS4.2.1 needed a tethered jailbreak. i did mine with redsnow an it was tethered only.

[acnpt]

Worked first time for me, iPad 4.2.1 (restored first) :)

[Kool Box]

Yup everything looking good, IPhone 3GS 4.2.1

[WelshBluebird]

Pardon my ignorance doesn't redsnow/similar ones do the same?

Yes, but right now redsnow requires access to the iOS 4.2 beta 3 IPSW file, and needs the iOS 4.2 SSH blobs stored.

So greenpos0n opens it up to more people, and means you won't have to illegally download stuff (the iOS 4.2 beta 3 file) to jailbreak.

[krishna]

Thanks guy

[thealexweb]

Yup everything looking good, IPhone 3GS 4.2.1

Old or new bootrom? :D

[Dinggus]

Remember people, if you're relying on an unlock (using T-Mobile or any other SIM carrier) remember you need a Mac and PwnageTools and create your own custom firmware to save your baseband. Find more info here:

http://www.mobilesdna.com/news/how-to-jailbreak-jailbreak-iphone-with-pwnagetool-and-unlock-with-ultrasn0w/3171/