Download Greenpois0n RC5 to Jailbreak iOS 4.2.1

by on February 11th, 2011

GreenPois0n jail break and unlock ios

The Chronic Dev Team released Greenpois0n RC5 to jailbreak iOS 4.2.1 completely untethered for iPhone 4, 3GS, 3G, iPod Touch and iPad without requiring SHSH blobs for iOS 4.2b3. Download Greenpois0n RC5 to Jailbreak iOS 4.2.1 and use following guide to jail break iOS 4.2.1.

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Download Greenpois0n for MAC

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Greenpois0n Website

How to Jail Break iPhone 4/3GS Untethered on iOS 4.2.1 Using Greenpois0n RC5 (Mac OSX)

The following guide will help you to learn that how to jailbreak iPhone 4, 3GS untethered on iOS 4.2.1 with Greenpois0n RC5. Users who rely on Ultrasn0w unlock must update to stock 4.2.1, otherwise stay away from Greenpois0n RC5 tool as they will lose the unlock.

  • Download Greenpois0n RC5, unzip it
  • Double click on Greenpois0n icon to launch it
  • Attach iPhone to Mac, power it OFF, click on Jailbreak button on Greenpois0n screen
  • Greenpois0n will instruct to put your iPhone into DFU Mode
  • Continue with the instruction
  • When your iPhone will enter into DFU mode successfully the jailbreak will be started
  • On completion, click ‘Complete’ button
  • After restart you will notice Greenpois0n Loader app sitting on Springboard
  • Tap on it to launch
  • Select Cydia and tap on Install Cydia button
  • After Cydia will be installed, it will prompt to remove Loader from your iPhone
  • Tap on Remove button to do that
  • Reboot your iPhone by pressing Home button
  • That’s it, you have jailbroken iPhone 4/3GS over iOS 4.2.1 with Greenpois0n RC5

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