Download RedSn0w 0.9.7b7 for Windows/Mac to Untethered Jailbreak 4.2.1 iPhone 4/iPad/iPod.http://mobile.downloadatoz.com/
(1) This is just a beta version for testers, if you are a beginners, it is better to wait for the stable version.
(2) If your iDevice has been tethered jailbroken, please start from step 1; if your iDevice has not been jailbroken, please start from Step 2.
Download Redsn0w 0.9.7 Beta7 for Windows/Mac from: http://blog.iphone-
Download iTunes 10.1.1 for Windows / Mac OS X: http://www.coveringweb.com/
Download iOS 4.2.1 for iPhone, iPad and iPod touch: http://www.coveringweb.com/
The detailed steps:
Step 1: Connect iPhone 4/iPad/iPod to PC. Use iTunes 10.1.1 to restore iDevice to the official iOS 4.2.1 firmware - To do this:
Hold down the "Shift" key and click restore, select the " iPhone3, 1_4.2.1_8C148_
Note: If encounter 1013 error, open your Hosts file, then add # before "18.104.22.168 gs.apple.com"
............Just click the link above to enter into our website to get more information.
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