Friday, November 19, 2010

Guide: How to Jailbreak iOS 4.2.1 GM on iPhone 3G/3GS/4 iPod Touch 4G & iPad using Redsn0w 0.9.6b2

Apple iOS 4.2.1 GM was released few hours ago for iPhone 3G,3GS,4 and iPod Touch 4G and iPad. And within few Hours Redsn0w has succeeded in Jailbreaking this new OS GM for Developers. iOS 4.2.1 can now be jailbreak using Redsn0w 0.9.6b2.

Developers has fixed all the Bugs in this New iOS 4.2.1 i.e Cydia can now be used on this OS. Cydia didn't worked on iOS 4.2.1 'cause it used it's Private API's and some other issues. But Developers has worked hard to Fix this Bug and they have succeeded. iOS 4.2.1 is now Publicily available and you can also install jailbroken-apps via SSH.
So here's what you were waiting for, Complete guide to jailbreak iOS 4.2.1 using Redsn0w on MAC and Windows:
First of all you need to download the Following:
iOS 4.1 for iPhone 3G, 3GS, 4, iPod Touch 2G 3G, 4G,
iOS 4.2.1 GM for iPhone 4. (Download Link)
iOS 4.2.1 GM for iPhone 3GS. (Download Link)
iOS 4.2.1 GM for iPhone 3G. (Download Link)
iOS 4.2.1 GM for iPod touch 4G. (Download Link)
iOS 4.2.1 GM for iPod touch 3G. (Download Link)
Redsn0w 0.9.6b2 for
Windows and  Mac 
iTunes 10.1 for Windows or Mac (Download Link)
Thing you should keep in Mind:
If you have an unlocked iDevice with ultrasn0w, you have to stay away from Redsn0w, as it updates your baseband to latest version, which is still unlockable till now.
Second Step: 
Use iTune to Update to iOS 4.2.1 GM Firmwares using the IPSW Files you downloaded.

Third Step:
Launch Redsn0w 0.9.6b2, and Browse for iOS 4.1 firmware final version (NOT iOS 4.2.1 GM).
Fourth Step:
Install Cydia and Press the "Next" Button.
Fifth Step:
At this Point your Device should be Turned Off and Connected to the Computer. Then Click "Next".
Now you have to put your Device into Dfu Mode, Follow the simple steps to put your Device into DFU Mode:
  • First of all,Press and Hold the sleep button for 2 seconds.
  • While holding the sleepbutton,Press the Home button for 10 seconds.
  • Now release the sleep button but continue Holding the home button for about 15 seconds.
Sixth Step:
Your Device is Now Jailbroken!

This was the Simple step by Step Guide to Jailbreak iOS 4.2.1 GM. If there's any suggestion please Comment. We'll give you More information on iOS 4.2.1 as we get more.

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