3GS/3G/2G & IPT3g/2g/1g Restore 3.1.3 to any, without SHSH. [untested]
This downgrade doesn't require you to do anything to your iPod, such as go into recovery or DFU mode, its just a simple RESTORE button. Requirements: an iDevice; Mac OSX (iPhone SDK/xCode is for OSX only, sadly. ...
Original post: 3GS/3G/2G & IPT3g/2g/1g Restore 3.1.3 to any, without SHSH. [untested] by at restore iphone 3g - Google Blog Search
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