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How to Root Samsung Galaxy S3 I9305 on Android 4.1.2 Jelly Bean XXBMB2

Owners of the Samsung Galaxy S3 model I9305 who are currently running Android 4.1.2 Jelly Bean build XXBMB2 can now root their device using ODIN. You will need to download the flashing tool and the rooting kernel in order to gain root access.

While rooting opens the Galaxy S3 to more possibilities, it also makes the device more vulnerable. Be always responsible when using a rooted device. Also, rooting will void the warranty. So, if you still want to claim it in case something bad happens to your phone, don’t root. Or, you can unroot your phone later for such purpose.

Disclaimer: Flashing of custom ROMs as well as rooting your device involves risks. While we are trying to be as accurate as possible in every guide we publish that does not guarantee that things will work out just fine. We don’t force you to follow any of the guides we publish. Flash and root at your own risk. You cannot hold us, The Droid Guy, liable for anything that might happen to your device and we are not obliged to provide support.


  • You should have backed up all your important data prior to this process.
  • This guide will walk you through rooting the S3 I9305 running Android 4.1.2 XXBMB2. It may not work in other builds.
  • Make sure you have enough power left; 80 percent of battery is recommended.
  • Enable USB Debugging.


1. Download CF Auto Root file for I9305XXBMB2 firmware. Extract contents to an accessible folder. [LINK]

2. Download ODIN flashing tool. Extract files to run the executable file. [LINK]

3. Run Odin as Administrator.

4. Turn off Galaxy S3 and boot to the Download Mode: press and hold VOLUME DOWN and HOME buttons while tapping on the POWER button until a warning message appears on the screen. You need to press VOLUME UP to enter Download Mode.

5. Connect you phone to your computer using the original USB cable.

6. Odin will confirm the connection. Otherwise, try to use different USB ports. If you cannot establish a connection for the S3 and the computer, try reinstalling the drivers.

7. Unders Options section on Odin UI, check options Auto Reboot and F. Reset Time.

8. Click on PDA button and find CF-Auto-Root-m3-m3zh-gti9305.tar.md5 file. Verify you’ve checked the right options and have loaded the correct md5 file.

9. Click START button to begin with the rooting process. It may take a few minutes to complete so you’ll have to wait patiently and not interrupt it.

10. Once the rooting process is complete, the Galaxy S3 will automatically be rebooted. Wait until it’s fully active before you disconnect and use the phone.

Now that your device is rooted, you can install third-party apps.

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