After a long wait, finally Chronic Dev-Team has released the Greenpois0n RC 6 to Jailbreak iOS 4.2.1 untethered on all devices. The recent release of Greenpois0n RC 6 does not require you to have SHSH blobs saved for 4.2b3 on the Cydia. Previously Dev-Team had released redsn0w 0.9.7 to achieve the same Jailbreak which required the SHSH blobs for iOS 4.2b3 and it was only available to users who had the Developer account. Anyhow here is the Quick guide to Jailbreak your iOS device with the latest version of Greenpois0n RC6.
What do you Need:
Greenpois0n RC 6
An Internet connection
iPod Touch 4/3G/2G
iPhone 4 users who rely on Carrier Unlock, must stay away from it. As upgrading to iOS 4.2.1 will update your baseband as well which is not unlockable as of yet.
Step by Step Guide:
Step 1. First of All Download the Greenpois0n RC6 Final.
Step 2. Now connect your iPhone via USB cable to your computer and Launch Greenpois0n. And Click Prepare to Jailbreak DFU
Step 3. Now you would require to put your Device in DFU Mode.
Hold down both Home Button and Sleep/awake Button at the same for 10 seconds.
After 10 seconds release Sleep/Awake Button However Keep holding the Home Button until*iTunes*pops up a message that *iTunes*has detected an iPhone in Recovery Mode and iPhone Screen would go blank. thats it.
Step 4. Once your Device is in DFU Mode. Press Jailbreak and It would start the process.
Step 5. Once the Jailbreak is complete Click Complete button to finish the Application. You will find Loader icon your Homescreen. Press to Launch it and Install Cydia. Thats it. You have now*successfully*Jailbroken your device on iOS 4.2.1 If you any question please feel free to let us know in the comment section below.
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