How to root Galaxy S III with Android 4.1.2 OS

Galaxy S III has not yet received the official update from Samsung to Android 4.2 Jelly Bean, but there are open source projects that allow the community to run the new system from Google.

Before reaching to the root process we need to specify that the I9300XXEMC2 is the latest official firmware available for the international version of Galaxy S III, distributed by Samsung through Kies. It comes with Android 4.1.2 Jelly Bean and offers improvements over the previous version such as more efficient use of RAM memory and other general improvements. The battery life also seems to be improved, but varies from one scenario to another.
The root method that we will use will be the CF-Root from Chainfire which is perhaps the simplest root technique available for a wide range of devices.

It should be noted that although this method has been tried and tested, no liability is assumed for any damage resulting from the wrong performing of this process. So, follow the steps carefully and root your device at your own risk.

Requirements:

- Samsung Galaxy S III GT-I9300 (international version) with more than 50% charged battery. We recommend to fully charge your device for more safety
- The CF-Root package
- Odin3
- The newest USB drivers for Samsung

Steps:

Step 1. Extract and install the USB drivers
Step 2. Download Odin3 and CF-Auto Rooth and extract the root package in a location
Step 3. Launch Odin 3, click on PDA button and select the tar.md.5 file that you have extracted from CF Root package.
Step 4. Make sure that the Re-Partition is not selected in Odin3
Step 5. Close your Galaxy S III device and put it into download mode by holding pressed the Volume Down (-), Power and Home buttons, then press the Volume Up button to confirm.
Step 6. With the device in Download Mode, connect it to PC via USB cable. If everything went well, Odin3 will detect the device, indicated by a valid COM address in the upper left corner of the program.
Step 7. Verify that the PDA file is selected and re-partition is not checked, then click on the Start button to flash the root kernel.
Step 8. Once the flash process is complete, the phone will reboot and will enter in Recovery Mode, automatically performing the root procedure. It will reboot again.

Now your Galaxy S III device is rooted to the latest firmware.

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