Root AT&T Samsung Galaxy S3 SGH-I747

How to root AT&T Samsung Galaxy S3 SGH-I747 using Odin (CWM Recovery included)

Thanks to our good friend from XDA-developers forum, we are now able to present you the easiest way to gain root access on your AT&T Samsung Galaxy S3 SGH-I747. Follow our next step-by-step guide and you will learn how to do it, in less than 10 minutes.

Why is so important to root your Android device? Well, the answer is quite simple: – as you might see, the South-Korean company doesn’t have any intention to push the Android 4.3 OTA update, any time soon, for this particular handset and that’s why you should learn how to flash it manually via custom ROMs. The only way you can flash a custom firmware to your Samsung device is by having root/administrator access.

Having root access, also opens doors for overclocking procedures, custom kernels, custom recovery images and many other tweaks and customization possibilities for your AT&T Galaxy S3 smartphone.

Before we proceed with the actual rooting process, you must read the following preparation guide, to fully understand what you are facing next:

  • The following rooting package is compatible only with the AT&T variant of Samsung Galaxy S3, which means that is mandatory to have the “SGH-I747” model number. In case you own a different S3 version, I suggest you not to proceed any further, as you may permanently brick your smartphone.
    - you can check your device’s model number by navigating to “Settings” > “About device”.
  • The following tutorial requires a connection between your Galaxy S3 device and a Windows based computer, so make sure you download and install the proper Samsung USB drivers first.
  • To avoid any undesired interruptions during the flashing process, you should disable any kind of security software that is currently running on your personal computer. This implies: antivirus, antimalware, firewall and any other similar programs.
    - another program that can interfere with the rooting process is “Samsung Kies”. Turn it off before your start with the procedure.
  • Enable the “USB debugging” option from your device’s “Developer options” menu.
    - in case you won’t be able to find this section under “Settings”, then go to the “About device” tab and press for 7 times on the “Built number” option. This way you will enable the development settings.
  • The rooting procedure may end up bad sometimes and you will be forced to apply the factory reset. This operation will erase all the content stored on your device’s internal memory and you will not be able to get them back. You can avoid this unpleasant situation by creating a full backup of your personal data and files.
    - use the “Helium” backup tool for your personal files and apps and this tutorial for your “Contacts”.
  • Your device’s battery level should be higher than 30% for this kind of operations.

So, let’s see the root guide for your AT&T Samsung Galaxy S3, SGH-I747.

How to root the AT&T Galaxy S3 using Chainfire’s rooting method

  1. Download and extract the following files in separate folders on your computer:
    - the “CF-Auto-Root” package from here. You should obtain a “.tar.md5” file.
    - the Odin v3.07 tool from here.
  2. Turn off your Galaxy S3 smartphone.
  3. Run the Odin application on your computer.
  4. Now it’s time to boot your Android device into “Download Mode”.
  5. Use a compatible USB cable to connect your handset to the computer.
    - wait for Odin to display the “Added!” message.
    - if Odin doesn’t recognize your device, then you should try to change the USB port or to re-install the USB drivers provided in the above preparation guide.
  6. In Odin, press the “PDA” button and load the “CF-Auto-Root-d2att-d2uc-samsungsghi747.tar.md5” file.
    -  Except the “Auto Reboot” and “F. Reset Time” options, no other box should be checked in Odin’s “Option” tab.
  7. When you are ready to begin the rooting process, just press the “Start” button.
  8. Once the rooting process is successfully completed, your device will automatically reboot into “Normal Mode”.
  9. To verify if you really have full control over your Galaxy S3 handset, install the “Root Checker Basic” app from here.
  10. That’s it, now you should start looking for your favorite custom ROMs, to update your high-tech smartphone to the latest Android version.
    - you will need a custom Recovery image to flash custom ROMs. Read this entire post and you will learn how to flash the controversial CWM Recovery image.

These were all the steps you had to take, to successfully apply root to your beloved AT&T Samsung Galaxy S3 SGH-I747.

Note: in case your device gets stuck at the Samsung boot animation logo or it doesn’t boot at all, you must apply the factory reset operation, we’ve been talking about at the beginning of this post. Here is the easiest way to apply factory reset for your Galaxy S3 device:

  • Turn off your Samsung Galaxy S3 and remove it’s battery for about 8-10 seconds;
  • Place it back and boot your handset into “Recovery Mode”;
    - press and hold: “Volume Up” > “Home” > “Power”.
  • Select the “wipe data/factory reset” section and confirm your action;
  • Use the “Go back” option to return to Recovery’s main menu;
  • Press the “reboot system now” and wait for your device to boot into “Normal Mode”.

Now, it’s time to show you how to replace your device’s stock recovery image with a custom one, in order to be able to flash custom ROMs.

How to flash CWM Recovery image on your AT&T Samsung Galaxy S3 I747

  1. Open the “Play Store” app on your Galaxy handset.
  2. Download and install the “ROM Manager” tool.
  3. Open the application you’ve just downloaded and select the “Recovery Setup” section.
  4. Press on the “ClockworkMod Recovery” option from the “Install or update recovery” tab.
  5. Confirm your device’s model: Samsung Galaxy S3 (SGH-I747).
  6. Now, select the “Flash ClockworkMod Recovery” option from the tab with the same name.
  7. The “SupperSU” app will ask for your permission to flash the CWM Recovery image. Press the “Allow” button and wait for a few seconds.
  8. You are done!

I hope you found this tutorial helpful and that you’ve successfully rooted and flashed the CWM Recovery image on your AT&T Samsung Galaxy S3 device. If you hit into any roadblock, then you should ask for our help in the comments box below.