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Root Android 4.1.2 XXEMD3 Jelly Bean for Samsung Galaxy S3 I9300 with CF Auto-Root

Root Galaxy S3 AT&T

Android 4.1.2 XXEMD3 OTA Update for the Samsung Galaxy S3 has been launched several weeks ago. Now, you can learn how to apply root for it without losing any important data in the process. Read this entire post and you should be able to complete the tutorial at your first attempt.

Rooting your smartphone will open up tons of new functions that are usually hidden or blocked n by Samsung’s / AT&T bloatware applications. After you root your Galaxy S3 I9300, you will be able to use applications that require rooting. Such apps are usually created to bypass various securities and allow you to change the UI of your device, boost the CPU performance and apply various other changes. Rooting the Galaxy S3 should open up a door to a multitude of new tools that you can use to enhance your Jelly Bean experience.

In order to successfully apply root for your Samsung Galaxy S3 you will first need to read the guidelines below:

  • this is a guide that works exclusively with the Samsung Galaxy S3 model number I9300. Don’t attempt to root any other Android device with the files you find in this post, as you will end up bricking it.
  • your phone has to be running the Android 4.1.2 XXEMD3 Jelly Bean firmware build and it has to be factory unlocked.
  • by rooting the Galaxy S3 you will void its warranty.
  • your computer needs the Samsung USB Drivers installed on it. That will make sure that the phone will be recognized by the ODIN app, a small program that we’re going to use in order to complete this tutorial.
  • download and install Samsung USB Drivers from here.
  • enable USB Debugging from the Developer Options menu.
    NOTE: if the Developer Options isn’t shown in Settings menu, then you need to click the About Device button, scroll down to Build Number and tap this section 7 times. This will re-enable Developer Options and you can enable USB Debugging.
  • disable the Samsung KIES software from running on your computer.
  • don’t run any antivirus or security programs on your PC while you’re using the Odin application.
  • make sure that your phone’s battery has enough power left before switching off completely.
  • this rooting process shouldn’t remove any data files from your Galaxy S3, but it would be best for you to create backups of all your important files.
  • if the phone doesn’t boot into normal after the root is complete, you will be forced to ‘factory reset’ it from Recovery Mode menu. Additional info is listed at the end of this post, info that you can use in order to force your device to boot into normal rooted Android 4.1.2 XXEMD3JB.
  • this tutorial is for advanced Android users.
  • don’t blame us in case you lose any important data files in the process nor in case you brick your device.
  • make sure that you won’t skip any steps that I have listed in this post and, if you cannot complete the root, ask for extra help in comments.

Now that you’ve read all of the above, continue to the next part of this article and learn how to successfully root your SGS3 using Chainfire’s root exploit files.

How to root Samsung Galaxy S3 I9300 on Android 4.1.2 XXEMD3 Jelly Bean using CF Auto-Root:

  1. Download the CF-Auto-Root file for SGS3 from HERE. Save the file on your computer.
  2. Extract the contents of this zip and save them on your computer.
    > you will get a file that’s named ‘CF-Auto-Root-m0-m0xx-gti9300.tar.md5‘. Don’t unzip any further than that.
    > after you extract the contents you will notice that there is also a Odin 1.85 file but you shouldn’t use that one, instead, use the Odin3 v3.07 listed below.
  3. Download Odin3 v3.07 from HERE. After the download is complete you should extract its files and save them on your PC.
  4. Power off your smartphone completely.
  5. Boot the Galaxy S3 into Download Mode.
  6. Launch ODIN exe on your computer.
  7. Connect your device with your PC using the USB data cable.
    > wait for Odin to say that the phone was ‘added!!’ and then you can continue to step 8.
    > if ODIN doesn’t recognize the phone, then you should switch between USB ports or re-install the Samsung USB Drivers, a download link is listed in the preparation guide above.
  8. Next, click the PDA button in ODIN.
  9. Find the ‘CF-Auto-Root-m0-m0xx-gti9300.tar.md5‘ file and load it into ODIN.
    > don’t change any other default settings.
    > make sure that the Re-Partition option is disabled before starting the root process.
  10. Now, if everything is set, click the START button and wait for all the rooting files to be flashed.
  11. When the root is complete, Odin will say ‘PASS’ and the phone will reboot into normal mode.
  12. Unplug the phone from computer and wait for the device to load the home screen of Android 4.1.2 JB and then head to Google Play Store.
  13. Download and install Root Checker app, launch it on your phone and then click the ‘Verify Root Access’. This tool will confirm that the root was complete and you’re done with this guide.

These were all the instructions that you had to follow in order to successfully apply root for your Galaxy S3.

If everything went according to plan, then you can close this guide.

NOTE 1: if ODIN didn’t complete the install, it said that the root has failed or some other error prevented the process from getting completed, then you should close ODIN, unplug the phone from PC and remove its battery. Re-insert the phone’s battery after 5 seconds have passed and then you should repeat the entire tutorial once again. This time you should make sure that you complete all the steps listed above.

NOTE 2: In case ODIN says PASS, but the Galaxy S3 doesn’t go past the Samsung animation screen or it enters into a boot loop, then you should unplug the device from PC. Now you will be forced to apply a factory reset that will force the smartphone to boot into normal mode. Here’s how to that:

  • note that this will wipe data from your device.
  • power off the phone completely by removing its battery and re-insert the battery after several seconds have passed.
  • now boot the Galaxy S3 into Recovery Mode.
  • select ‘wipe data/ factory reset’ option and confirm this process.
  • get back to the main Recovery screen and select ‘reboot system now’.
  • wait for the Galaxy S3 to boot into normal mode and that should be all.

I hope that you have managed to successfully root your Samsung Galaxy S3 using the CF-Auto-Root tool. If you have any other questions, then you should ask for extra help in comments. But, make sure to leave a detailed comment explaining exactly which steps you took and where you got stuck.


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