Chronic DevTeam just released the new greenpois0n update, which will allow us to apply an untethered jailbreak to our iOS devices running iOS 4.2.1 ( and iOS 4.1.1 ). At the moment, the tool is available only for mac users, but windows and probably linux support will come soon…
Download the Greenpois0n app for Mac or Windows from the download links above Unzip the files to your desktop and then click on the Greenpois0n application to open it Plug your iOS device into your computer and ensure the device is turned off completely. Download GreenPois0n. Current Version: RC4. GreenPois0n for Windows: gpwin32rc4.zip GreenPois0n for Mac OS X: gpmacrc4.zip GreenPois0n for Linux: gplin32rc42.tar.bz2. Old Version: RC3. GreenPois0n for Windows: gpwinrc3.zip GreenPois0n for Linux: gplinrc3.tar.gz. Update for GreenPois0n will be posted on official website at greenpois0n.
Greenpois0n Download 4.2.1 Ipod Touch
1. Download greenpois0n ( mirror download) ( Chronic released GP RC5-2 which should fix most of the issues…. mirror link updated )
2. Restore your iOS device to iOS 4.2.1. Note: if you need to unlock do not do this. Restoring to a stock FW will upgrade your baseband and you will loose the ability to unlock – probably forever.
3. Connect your iPhone and load greenpois0n
Download Greenpois0n For Mac Free
4. Click on Jailbreka and follow the instructions on the screen to put your iOS in recovery mode
5. Once in recovery mode, an automated process will start and will jailbreak your device.
6. After the jailbreak is done, you will have a new application on your springboard called Loader. Use it to install Cydia, then it will ask you if you want to remove it. You can, or you can keep it for nostalgia. A quick re-spring, and you now have Cydia. You know what to do next.
7. Enjoy
Download Greenpois0n 4.2.1
The custom animated bootlogo is bulit in right now. To apply our own custom animated bootlogos we will need an additional Cydia application which is not available at the moment. We will keep you informed. Stay tuned…
ALSO READHOW TO: Use TinyUmbrella To Preserve Your iPhone 4 Baseband And Jailbreak iOS 4.2.1 Using Greenpois0n
ALSO READHOW TO: Use GreenPois0n To Untethered Jailbreak iOS 4.2.1 [Windows]
ALSO READHOW TO: Use Greenpois0n To Jailbreak The Verizon iPhone 4
ALSO READHOW TO: Use Greenpois0n To Untethered Jailbreak The AppleTV 2 Running iOS 4.2.1
ALSO READHOW TO: Enable The Animated Bootlogo In Greenpois0n RC5_2
Chronic Dev Team has finally released the much awaited GreenPois0n RC5 which brings full untethered iOS 4.2.1 jailbreak for all iOS devices. Unlike Redsn0w 0.9.7, GreenPois0n RC5 doesn’t require you to have SHSH blobs of 4.2b3 saved on Cydia. You can jailbreak any iOS device out of the box on iOS 4.2.1 using this latest version of GreenPois0n.
The following instructions will help you jailbreak iOS 4.2.1 on iPhone 4, 3GS, iPod touch 2G/3G/4G, Apple TV and Apple TV 2G using GreenPois0n.
NOTE: If your iPhone 4 rely on an unlock, do not update to iOS 4.2.1 yet as doing so will upgrade your baseband, making it impossible for now to unlock.
Step 1: Download GreenPois0n from the link given above.
Step 2: Connect your iPhone via USB to your computer and click on “Prepare to Jailbreak (DFU)”
Step 3: Now just follow the following onscreen instructions to enter DFU mode
Step 4: Your device is now ready for jailbreak. Click on “Jailbreak” to inject the exploit.
Step 5: Your iPhone, iPad or iPod touch should now be successfully jailbroken on iOS 4.2.1. Now start “Loader” found on the homescreen and install Cydia.
Guys, screenshots to follow, need to sleep now...
Sadly, only released for MAC users, Windows and Linux users will need to wait...