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


  • Hi I Followed all your steps and everything worked. the phone passed but im stuck on the downloading screen.
    i have held button to restart and the samsung logo comes up then dissapears back to the the downloading screen.

  • Hi i am from india and want to root my s3 4.1.2 which is the latest one december can i root by following same instruction

  • Hi there lovejeet. just one question I have for you. I have Australian Vodafone i9300t so is that the “international” model that I can use your guide to root it with? the research I have done indicates that indeed it is but I have been putting off rooting my phone for fear of being wrong. thankyou for your time brother 🙂

    • Hi brad, the research you have done is absolutely correct, both the I9300 and I9300T have the same hardware and on many forums people have reported to have successfully rooted the I9300T using CF Root intended for the I9300. you can try following this guide to root your Galaxy S3. I think it would just work fine. But don’t forget to take a backup of your data in case anything goes wrong.

  • Hi Lovejeet! Thanks for all the info but I’m still confused. I have a carrier unlocked S3 I9300 which is running 4.3. I want to root my phone for the first time but I do not plan to install custom roms. I could possibly update to latest stock firmware in the future fow which I might have to flash the stock roms.

    Do I have to worry about my bootloader being locked or unlocked to root? How do I know whether it is locked or unlocked? When I root the process involves some sort of reflashing of something as far as I understood so does this mean I have to be bootloader unlocked?

  • Hi lovejeet! I want ask question Iwant tell u that i am using this phone first time and i dont know the meaning of Rom can give me the answer from where can i download rom

    • (Android Read Only Memory) A file containing the executable instructions (the system image) of an Android OS and affiliated apps. The stock ROM comes installed on the phone or tablet, while a custom ROM comes from a third party. The custom ROM is either a uniquely modified OS or a stock version made available before the vendor releases it for that model. Sometimes, a custom ROM of the latest OS is made available by a third party for a device that the vendor no longer updates. With android anybody everybody is free to make their own ROM’s’s. If you are using the galaxy S3 then you can find lots of new ROM here:

  • Hi bro,

    I was trying to update my phone using KIES. It was going on but suddenly at 85% , it automatically crashed and affter that i m not able to do even emergency recovery. Once it finish downloading file from server then it gets stucked. Don’t know what to do.

    Please advice.

  • hi lovejeet i have rooted my S3 as per ur guidance and m facing slow charging issue and battery is also draining out fast and as now 4.3 official update is available in India,when i checkd via OTA it comes with an error the phone is modified so can’t update,can u please tell me how to unroot my phone,plzzz m waiting

    • You need to go to your phones setting and then to the About device section. there you can find the model number of your Galaxy S3. The model number for the international version of the galaxy S3 is GT-I9300. Here’s a screenshot from my phone.

  • i tried twice that u describe here. still my samsung s3 gt-19300 on android 4.1 is not rooted. why? can’t understand… plz help

  • everything went well until step 8. and then when i would select the CF-Autoroot file there wasn’t any file. despite i download it. plz help me:)

  • hi 0:com doesn’t appear 🙁 i dont think its my usb cable would you suggest another version of odin?thank you
    i hope you reply

  • Wow. personally I think this page is without question engaging since I am using Odin 3.07. For the most part what got my attention best in this blog post is My PDA Button is always in disabled state. I think this is some issue when we use Odin 3.07 with Windows 8.1. Can you assist?.

By Lovejeet