How to Root Samsung Galaxy S3 I9300 on Android 4.1.2 [ September 2013 ]


Just a month back Samsung released a minor 40 MB update for Samsung Galaxy S3 I9300 running Android 4.1.2 (  Feels bad stuck on Android 4.1.2 for ages ) , Officially there were no change logs provided for the update but we can assume that it was probably an minor performance  upgrade . As it is with installing an Official software update , My Samsung galaxy S3 was unrooted in this process .

Once again i had to source for the latest CF auto root and Odin to root my Samsung galaxy S3 . In fact i even tried Framaroot which had previously worked on my Samsung galaxy S3 , but after the update Framaroot was unable to root my Galaxy S3 . So the only option i had left was to root my Samsung Galaxy S3 through Odin .

If you had installed the same update , then follow the instructions below to manually root your Samsung Galaxy S3 I9300 using Odin and CF-Auto-Root by Chainfire .

NOTE: This guide is only for users having the international version of the Samsung Galaxy S3 I9300 .

Instructions to Root Samsung Galaxy S3 using Odin

  • Step 1: Download CF-Auto-Root and Odin from the links below :

Download CF-Autoroot
Download Odin ( Use Odin 3.07 from this package )

  • Step 2: Install Odin on your PC and run it as Administrator . Now lets prepare your phone for rooting .
  • Step 3: Enable USB debugging in your phone . To enable USB debugging navigate to Settings > System > Developer options > Debugging > USB debugging .


  • Step 4: Turn off your phone and turn on your phone into download mode by pressing the Volume down + Home + Power keys together . When your phone displays a warning , press the Volume up button to continue into Download mode .
  • Step 5: Connect your Samsung galaxy S3 to your PC using a Data cable .
  • Step 6: You should now see the Odin’s ID:COM status change into blue and an Added message will be displayed .
  • Step 7: Check Auto reboot and F.Reset options in Odin .


  • Step 8: Click on the PDA button and select the CF-Autoroot file .
  • Step 9: Double check all the instructions above and Click Start to Root your Samsung Galaxy S3 . Wait for a few minutes and you will see a Success message as below :


If you want to confirm whether your Samsung Galaxy S3 is rooted not then Install the Root checker app from the Google play store .Here is a screenshot of root checker app on my Samsung Galaxy S3 .


About the author


Lovejeet is a Proud Geek and tech. enthusiast, who is ardent to learn more about the technology that surrounds us. He loves to tinker around with his gadgets and when he find something new and exciting, he shares it with you on this blog. Last but not the least he is a true gamer by heart. Connect with him on and Twitter


  • lovejeet! it fails on mine! what should i do?
    these are displayed on the message:
    Enter CS for MD5..
    Check MD5.. Do not unplug the cable..
    Please wait..
    CF-Auto-Root-m0-m0xx-gti9300.tar.md5 is valid.
    Checking MD5 finished Sucessfully..
    Leave CS..
    Odin v.3 engine (ID:7)..
    File analysis..
    Get PIT for mapping..
    Firmware update start..
    NAND Write Start!!
    All threads completed. (succeed 0 / failed 1)

    • wow lol
      im good now
      i do the steps all over again

      i turned off my phone. then it shows the firmware upgrade encountered issue blabla
      then turned it off and on using the power-home-volume down
      then do all the steps again
      my phone is working again

By Lovejeet