Install Stock T999UVUEMJC Android 4.3 for T-mo Galaxy S3 SGH-T999

T-Mobile Samsung Galaxy S3 official Android 4.3 update has just released and this comes in firmware build number T999UVUEMJC. The T999UVUEMJC 4.3 update now comes with Galaxy Gear support and KNOX security suite, according to the brief changelog given by T-Mobile which is actually the baseband version is not T999TUVUEMJC, without the letter “T”.  For those who can’t update via OTA and only getting update failures or more likely if your Galaxy S4 T999 is rooted, currently running with custom recovery, ROM and modified kernel, then this is for you.

T999UVUEMJC T-mobile galaxy s3 4.3 update

Before proceeding, you must be aware that the 4.3 has now comes with a new bootloader that includes the KNOX security applications. This KNOX apps now comes a built-in ‘KNOX warranty void’ counter in system recovery, meaning once you installed or upgraded to 4.3 firmware you have now a limited access to the new  bootloader. The possibility of gaining root access, or installing custom recovery and ROMs will result into tripping this KNOX warranty void counter, from the default count of ‘0x0’  to ‘0x1’. Risk of soft-bricking your device may also occurs when you try to restore back to previous 4.1.2 T999UVDMD5, for its also reacts the 4.1.2 bootloader.

Again, this process is only for those who got the original T-Mobile Samsung Galaxy S3 (SGH-T999) not the 3G/4G LTE (SGH-T999L) and currently runs in unofficial firmware or with root installed and wants to restore back to official firmware. Typical users who did not touch their phone OS and currently runs with official firmware T999UVDMD5, you must only update via OTA or Kies. This method is called manual flashing, just an option if Kies and OTA already blocks your devices from updating, something like it just says “This device is not supported by Kies” or “update failed” on OTA update.

Just follow this guide and manually install it, this will not trip the binary flash counter and wipe all stored data. But backup all important files first. This is for safety precautions and usually doesn’t delete the files during the process, in-case if you run into problems and you may be forced to perform factory reset. Re-setting the phone will delete all data.

Disclaimer: We shall not be held responsible if anything happens to your device by following this guide. Proceed at your own risk.This procedure is for advance users only, typical users may only upgrade only thru Kies or via OTA and may not usethis method.


– Back up all important files before proceeding. Although the Internal memory and microSD card are both left alone during after the flash process for this firmware is a non wipe version. But all your settings and configuration will all be reset. So, be sure to have a back up all of it for safety.
– If your device currently runs with any custom ROM, you may ask any assistance first from your ROM developer on how to safely return back to official stock to get rid of any issues. Mostly devs advises you to perform Full Back-Up via CWM/TWRP recovery and perform Wipe Data/Dalvik cache before performing Odin back to stock.
– Fully recharge your phone’s battery.

Download Odin Flasher and USB driver
Odin3_V3.09 downloader Here
USB Driver Here
Grab the Original T999UVUEMJC stock firmware

Odin Guide: Flash T999UVUEMJC Android 4.3 Jelly Bean Firmware on Samsung Galaxy S III SGH-T999

1) “Extract” or “unzip” the downloaded T999UVUEMJC stock ROM to get the .tar.md5 file.
2) Run Odin3_v3.09.exe in your commputer
3) In Odin –  DO NOT CHECK the RE-PARTITION checkbox, only both ‘Auto Reboot’ and ‘F-Reset’ left checked.
4) Click on the ‘AP button‘ then browse to the folder where you extracted the stock UVUEMJC firmware.

5) Reboot the phone in download mode: To reboot the Galaxy S3 into  download mode , you need to turn the power off.  After it completely shut off,  just  press and hold the Volume Down key,  Home button and the PowerON/OFF button simultaneously.
Samsung Galaxy S3 Download Mode buttons Volume Down,HOME,Power keys
You will then press the volume up key to continue. You’ll be prompted with a warning screen and asking you  to press “volume up” if you want to continue or volume down to cancel, just simply press volume up to get into download mode. The download mode then displays an Android robot and say’s “Downloading.. Do not turn off target!!”
6) Once the phone in download mode screen, connect the PC USB cable To Phone. The highlighted ID:COM box is and indication that the device is connected properly to PC. If you still do not get any results, try another USB port on your computer.
7) Click the Start button to begin flashing.
8) Wait until it finishes or watch out for the word “PASS”. Then remove it from PC once completely reboots,.

Optional fix:   If you experience bootloops or just stuck on Samsung screen after flashing; You can easily fix these symptoms by performing wipe data/factory reset. Just ensure to backup all file first before doing so.
1. Turn-off the phone, then hold Power and Volume Up together, this will switch the device into recovery mode.
2. Release Power after holding it for a second but continue to hold the Volume Up button until recovery menu appears. Use Volume keys to toggle UP and DOWN selection.  The power button to enter your selection.

Select wipe cache
Select wipe data/factory reset.
Select reboot

You will then confirm if the fresh firmware was successfully installed by hitting your Galaxy S3 Settings>> About Device. You should see that T999UVUEMJC as the baseband build version. That’s all!


    1. Before I give my ideas, here’s a question first. Are you rooted? What ROM, custom recovery you are running? Are you sure you have the SGH-T999 and not the LTE version SGH-T999L? That error only appears when you try to flash a firmware to a non-specific device or your you are running completely a modified firmware that has prevented your device to get re-written again. Odin will check the device compatibility first once the firmware is loaded before it let you flash through completely. From this point of (AUTH) error Odin protects your device from soft-bricks.
      Here’s my ideas,
      If you are still 100% on 4.1.2 base ROM and no trace of any 4.3 base ROM or otherwise this will not work. Try to Odin back the previous build 4.1.2, once you successfully returned back to official 4.1.2 take the 4.3 update via OTA or Kies from there.

  1. From “About device” under “Model number” it says “SGH-T999” (there is no “L” at the end.) Under “Status” the “Mobile network type” is “LTE:14”. Finally, under “Mobile networks” it provides “LTE/GSM/WCDMA (Auto)” as an option. So, it appears to be a LTE-compatible phone even though the model number does not specify the “L”. Which stock rom do I use? The one for the SGH-T999 or SGH-T999L? Thanks.

  2. I have a SGH-T999 I bought May of 2013. I have updated the firmware to bld T999UVUEMJC(android 4.3) recently from a rooted stock 4.1.2. I had neglected to do full reset before and have not since. I did want to root the 4.3 after update, however have not had time and have not found a way. What could/would be the result if I were to flash the stock 4.3 for the SGH-T999 “L” onto my SGH-T999? Advice on that and or on other firmwear I could load?

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