So you've just stopped by your local Vodafone outlet and picked up your shiny new Samsung Galaxy SIII. With its quad-core Tegra 3 processor and 1 GB of RAM, the device screams with power. However, as a true mobotnik, your experience with an Android device is never complete unless you root. Today let's look at the easiest root method for the Galaxy SIII i9300 (international version), CF-Root.
Created by the developer Chainfire, the application is quite robust. First thing you'll need is the CF-Root 6.4 package. Save this to your desktop. Next download Odin 1.85. As always when using Odin, remember that you can very easily brick your device if you disconnect your phone at any point during the flashing process.
Now that you have the files downloaded, unzip the CF-Root package from earlier. Inside is a .tar file called CF-Root-SGS3-v6.4.tar extract this to your desktop. Extract Odin 1.85 as well and run the .exe file inside the folder. Next turn your phone completely off and then turn it on again while holding the volume down, home, and power buttons at the same time to put the phone into download mode. Connect your device to your PC and you should see the Odin GUI on your desktop list the device as having connected on its respective COM port.
At this point, click on the PDA button and select the CF-Root-SGS3-v6.4.tar file. Make sure that the “Repartition” box is not checked and press “Start”. At this point, the green bar indicating the task's progress will begin filling up. As soon as it's finished your device will reboot and presto: not only should you be fully rooted, but your device will even have ClockworkMod recovery installed on it as well, so that you can flash custom ROMs. Of course, you can also run Triangle Away later, to remove that pesky flash counter. So now that you're rooted, head on over to your favorite Android site and pick a custom ROM. Enjoy.