How to Root T-Mobile Samsung Galaxy S3 SGH-T999 on Android 4.1.2 Jelly Bean Firmware. Android 4.1.2 firmware was rolled out to T-Mobile Galaxy S3 at the end of May 2013. If you want to root your T-Mobile Galaxy S3, then you should follow the tutorial below. This Tutorial will guide you on How to Root T-Mobile Galaxy S3 SGH-T999 on Android 4.1.2 Jelly Bean Firmware. I have written some important tips below, it is recommended that you take a good look at them and keep them in mind.
Disclaimer: All the custom ROMs and firmwares, official software updates, tools, mods or anything mentioned in the tutorial belong to their respective owners/developers. We or the developers are not to be held responsible if you damage or brick your device. Proceed at your own risk.
- Rooting will void your device’s warranty.
- This root method is only for T-Mobile Galaxy S3 SGH-T999, don’t try this on any other variants of Galaxy S3.
- Charge your battery up to 70%.
- Make sure USB Debugging is enabled. For ICS, Go to Settings > Applications > Development > USB Debugging. For Jelly Bean Go to “Settings > More > Developer Options” and check USB debugging. If your device does not display Developer Options, go to “About Device” and tap on “Build Number” Seven (7) times. Developer Options will appear in Settings.
- Backup your phone data (Just in case anything goes wrong)
- Make sure your Galaxy S3 is on Official Android Firmware.
- Install T-Mobile Galaxy S3 SGH-T999 USB drivers -> Download USB Drivers for T-Mobile Galaxy S3 SGH-T999.
I have written this detailed and easy to understand step-by-step instructions guide on How to Root T-Mobile Galaxy S3 SGH-T999 on Android 4.1.2 Jelly Bean Firmware. If you are used to rooting your Galaxy S3 through Odin, then this should not be any different for you. However, for beginners, it is recommended that you read the whole tutorial before rooting your device.
How to Root T-Mobile Galaxy S3 SGH-T999 on Android 4.1.2 Jelly Bean Firmware:
Step 1 – Extract the CF-Auto-Root-d2tmo-d2tmo-sght999.zip file you downloaded.
Step 2 – Run Odin and turn off your phone. Now put the phone into Download Mode by pressing and holding Volume Down and Home buttons together and then press the Power button until the construction Android robot and a triangle appear on the screen. Press Volume Up to continue.
Step 3 – Connect your phone to the computer using a USB Cable and wait for some time. One of the ID:COM box will change its color with the COM port number as you can see in the image below. If it does, your phone is connected properly. If it doesn’t, try to plug in USB into another USB Port in your computer. Still not working? Re-install the USB Drivers.
Step 4 – In Odin, click on PDA button and select the CF-Auto-Root-d2tmo-d2tmo-sght999.tar file.
Step 5 – Make sure Auto-Reboot and F.Reset Time options are checked and others unchecked.
Step 6 – Click Start Button. Installation process should begin now and would take a few minutes to complete.
Step 7 – After the installation process completes, wait for your device to reboot and when the device shows Homescreen, remove the USB Cable.
Your T-Mobile Galaxy S3 is now rooted on 4.1.2 Android Firmware your device is. To verify, check SuperSU app in the App Drawer. If you run into any problem, just let us know in the comments section below and we will give you a solution as soon as possible.