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how to root galaxy s3

How to root Samsung Galaxy S3 I9300 Android 4.1.2 Jelly Bean XXELL6 firmware

Owners of Samsung Galaxy S3 i9300 who have already updated to Android 4.1.2 Jelly Bean XXELL6 build should have lost root access after the update. The good news is there is a way to root the new firmware using CF-Auto-Root and Odin application.


Rooting is important to people who love to hack, install tweaks and flash custom ROMs and mods into their devices. So, we provide a step-by-step tutorial on how to gain root access to Samsung Galaxy S3 i9300 running Android 4.1.2 Jelly Bean XXELL6.

Reminder: Rooting will void your device’s warranty but you can reclaim it by re-installing the official firmware. To check whether your device is rooted or not, visit the Google Play Store and download/install Root Checker app; it’s free.


  1. Backup all your data inside your phone including videos, SMS messages, contacts, settings, files, etc.
  2. Fully-charge or check if your device has at least 80 percent battery left.
  3. Enable USB Debugging: Settings => Applications => Development.
  4. Install all necessary drivers in your computer to make sure your phone can be detected properly.
  5. Check the model number of your device: Settings => About phone. You should know this tutorial is for international variant with model number i9300 only.
  6. Download these files: Odin 3.07 and CF-Auto-Root. Extract contents of these packages into a directory you can easily find and access.

Rooting Guide

Step 1: Run Odin v3.07 as Administrator and turn off your Galaxy S3.

Step 2: Now boot your device into Download Mode: press and hold VOLUME DOWN and HOME buttons simultaneously while tapping on the POWER button. A “Warning!” message would soon appear, press VOLUME DOWN button to continue booting into Download Mode.

Step 3: You may now connect your device to your computer using the original USB data cable. One of the COM ports will turn yellow and a number should be visible indicating port number. You can also see message “Added!” at the bottom-left of the Odin interface if the connection between your computer and device is good.

Step 4: In the Options section, check Auto Reboot and F. Reset Time options.

Step 5: Click on PDA button and navigate through the directory where you have extracted contents of CF-Auto-Root package and look for CF-Auto-Root-m0-m0xx-gti9300.tar.md5 file.

Step 6: When you are sure you did the right thing while following previous steps, then you may now click on START button to commence flashing. Odin will then display “PASS” at the left-most box at the top of Odin interface. Your phone will automatically be rebooted and once it’s up and active, it’s already rooted.

Disclaimer: This tutorial is for reference purposes only. The Droid Guy will not be held responsible for damages caused before, during and after rooting.

[xda developers]

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