Root T-Mobile Galaxy S3 SGH-T999 on Android 4.1 Jelly Bean Official Firmware

• Last modified: Android Tips

Android 4.1.1 Jelly Bean has started rolling out for T-Mobile Galaxy S3 SGH-T999 in the US. Since most of you would have already updated your phones, you would have lost root access. We ave written a complete tutorial on how you can get back root access on your phone with this latest Jelly Bean firmware — and this root method also works with Android 4.0.4 ICS official firmwares. You can root Galaxy S3 SGH-T999 on Android 4.1.1 Jelly Bean official firmware using the tutorial below.

As you continue reading further, we will guide you through the entire process of how to root Android 4.1.1 on T-Mobile Galaxy S3 SGH-T999 using ODIN. Make sure you backup all your data before trying out the root method tutorial below. Rooting will allow you to install root apps on your phone, i.e Titanium Backup. Let’s continue with the tutorial now.

Samsung Galaxy S III - Pebble Blue

Disclaimer: All the tools, mods or ROMs mentioned below belong to their respective owners/developers. We (TeamAndroid.com) or the developers are not to be held responsible if you damage or brick your device. We don’t have you on gun point to try out this tutorial ;-)

About CF-Auto-Root:

CF-Root is the root for “rooting beginners” and those who want to keep as close to stock as possible. CF-Root is meant to be used in combination with stock Samsung firmwares, and be the quickest and easiest way for your first root. A modified recovery and cache partition will be flashed, which will install (only) SuperSU, then clean-up the cache partition and re-flash the stock recovery.

NOTE: Using this root increases your flash counter. You should run Triangle Away after rooting to reset the counter. Note that if you want to run custom kernels or custom recoveries, your flash counter will be set to 1 at every boot. Either configure Triangle Away to reset the counter at every boot (Play version only) or only reset the counter when you need to go into warranty.

Make sure you have installed all your USB drivers for the Samsung Galaxy S III to connect it with the computer. Download Samsung T-Mobile Galaxy S3 USB drivers! Apart from just the USB drivers, there are a few more things that you need to take care of.

1. You need to enable USB debugging mode. This helps to connect your Android phone with the PC. See here: How to Enable USB Debugging.

2. Your phone battery should be 80-85% charged. If your phone goes off suddenly because of battery, during flashing ROMs or installing mods and updates — your phone might go dead permanently. See here: How to Check Battery Percentage.

3. Backup all your important data that you might need as soon as your flash a new ROM, or make a backup for just in case, you never know when anything might go wrong. See below on how to backup data:

Data can also be backed up using Samsung KIES for their devices, but if you backup data manually, you get more options what top choose from and it is very easy to move data across Android devices from different manufacturers, i.e moving Samsung Galaxy Note backup data to HTC One X.

4. Your phone should be factory unlocked. Additional instructions for locked Android devices will be added in the tutorial for unlocking devices.

You may also want to read:

Now, let’s proceed with the tutorial on the next page and root T-Mobile Galaxy S3 SGH-T999 on Android 4.1.1 or Android 4.0.4 official firmware.


  • kevo156

    thanks guys i followed the instructions to the t odin gave me a green pass every thing looked good but root checker says its not rooted, my phone is not unlocked is that something that is needed?

  • DZ

    great men ! work like a charm Thank

  • CajunInTexas

    Thank you for the instructions. My phone was rooted before updating to 4.1.1. I’ve followed your instructions, the phone boots into recovery mode and seems to root the phone, but it’s still not rooted. Any help would be greatly appreciated.

  • CajunInTexas

    Thank you for the instructions. My phone was rooted before updating to 4.1.1. I’ve followed your instructions, the phone boots into recovery mode and seems to root the phone, but it’s still not rooted. Any help would be greatly appreciated.

  • The Bacon Master

    My Galaxy S3 4.1.1 completed the root process in less than a min. AWESOME! Kudos to you!

  • SimplySeth

    so this is only possible with a windows machine ?

    • http://www.harisnadeem.com Haris Nadeem

      Yes, ODIN only works on Windows. I am a Mac user myself, but always have to shift to Windows for most of my Android stuff.

  • idem1925

    manual al español

  • http://www.facebook.com/marko.hidalgo3 Marko Tinoco

    bien gracias funciono de maravilla!!!!

  • eric

    any chance for a MAC tutorial.. i have 4.1.1 and NOTHING works at all, and i dont have access to bootcamp or a pc.. any help please.