iPhone Jailbreak iOS 4.2.1 with RedSn0w

redsn0w iphone jailbreak iOS 4.2.1
For jailbreaking of  iOS 4.2.1 for iPhone; RedSn0w has been updated from its older version by Dev Team. It should be noted that the iPhone 3G and iPhone 3G has been a coward, while 4 jailbreak jailbreak iPhone has a home, every time the user reboots the iPhone device must be connected to the computer, then redsn0w could be introduced to begin the iPhone.

Below there are the steps involved to perform jailbreak on the iPhone iOS 4.2.1 with RedSn0w:
  1. It is very important to check whether the latest version of iTunes is installed or not. If not updated, do update iTunes immediately.
  2. Then download RedSn0w 0.9.6b4 and the related firmware for the concerned device from HERE.
  3. Then initiate the launch of RedSn0w and browse the previously downloaded firmware and proceed with installation of Cydia.
  4. It should be noted that the iPhone must be turned off and plugged in the computer and then click next in order to get the iPhone ready for DFU mode.
  5. Press and hold the Home and Power button simultaneously together for ten seconds. Then release the Power button by keep holding the Home button for a few seconds.
  6. Then some lines of code will be executed in the iPhone which will be visible to the user and then finish button will appear. Click on the button and the procedure is done.


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