Available for free download immediately, the firmware means that developers can now begin to port the latest version of the user interface, TouchWiz 5.0, to the Galaxy S II, Galaxy Note, and other devices that support Android 4.0 ‘Ice Cream Sandwich'.
Publishing the link to the ROM, Danny D said: "So now the wait is over, we only need the phone itself."
Android developer Chainfire excited high-end mobile optimisers when he released the root for the S3 on 18 May.
Rumours continue to circulate regarding the release date of the new phone, with guesses ranging from 28 May to early June, though keen consumers can pre-order units now.
ITProPortal attended the launch event for the Samsung Galaxy S3, where we have published hands-on pictures and video of the mobile phone - along with comparison features to the Apple iPhone 4S, Galaxy Note, Galaxy Nexus and the Galaxy S II.