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GreenPois0n RC5 (Windows/MAC) Untethered Jailbreak for iOS 4.2.1 Released

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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 RedAttachment 622712sn0w 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.

WORKING WITHOUT ANY PROBLEM
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