Update Galaxy S3 SGH-I747M to Android 4.3 UMUEMK3 Official Firmware

Galaxy S3 SGH-I747M will be in a whole new place with Android 4.3 UMUEMK3 installed on it. This official firmware just came out and it works only on your smartphone launched last year in June.

Mexico (TCE) is the country this new firmware is meant for. If living there, you should make sure your handset has Telcel as its carrier. If you don’t have the I747M, don’t use this guide. Why? Because you will end up bricking your smartphone and its firmware in the process.

After your handset runs the new firmware, you will be able to enjoy all sorts of new stuff, like the features and options which make the Android 4.3 desirable, as well as no bugs. The phone will deliver a much better performance as a consequence.

The Jelly Bean 4.3 UMUEMK3 official firmware and its KIES logo is already activated. Which makes it impossible to upgrade your S3 I747M with the KIES software. Which, in turn, means that only OTA (with the Software Update button under Settings menu) or our tutorial work if you want to enjoy the Android 4.3 on your smartphone. Be aware, though, that only a handset which has a custom ROM can receive this upgrade.

You may have a rooted Galaxy S3. If that’s the case, the new stock firmware will revoke the root access. Along with that, the firmware will have its system partition affected by the update. All of your handset’s important content will not be erased and the internal as well as external SD cards will also stay intact.


After reading all of the above, we recommend you to find out what pre-requisites you should consider:

  • back up the data on your smartphone by creating a regular backup and then a NANDroid one, via this guide;
  • your laptop and smartphone must have their security programs disabled for this guide;
  • turn on USB Debugging on the phone;
  • install USB drivers for this smartphone from this page on your notebook or PC;
  • use a comp (or laptop) that comes pre-loaded with Windows;
  • charge the battery of your handset.Galaxy-S3-SGH-I747M


That’s a wrap on this portion. The rest of this guide will focus on helping you update your device.

  1. Which should begin like instructed here: download (file name: TCE-I747MUMUEMK3-20131202100812.zip) together with Odin, available here; these two files should be downloaded on your notebook or comp. When the download is over, you need to make sure they are saved on the same notebook or PC, then extract them.
  2. The smartphone will then need to be booted into Download Mode. Volume Down and Home simultaneously and then be sure to press only Power; the phone will soon power itself on, which means you should press Volume Up afterwards.
  3. After getting your device in that mode, you should open the Odin as Admin on the laptop.
  4. Then establish a connection between your phone and your notebook with the former’s USB cord. A connection will be established only if you observe a yellow ID:COM box or “Added!!“.
  5. When the plugging does not happen, you have to re-install the USB drivers or make use of another USB port. Move on to the following set of guidelines by doing this: click on PDA, opt for a file that sports CODE in the name, tap Phone, select a file with MODEM in the name, click on CSC, opt for a CSC file, click on PIT and opt for a file with a .pit extension.
  6. Now comes the next set of instructions: check those boxes which have F. Reset Time, Auto Reboot and Re-partition near them. The new stock firmware will end up on your smartphone after you tap “Start” and wait for the process to finish.
  7. [sc name=”banner-jos”]The Galaxy S3 SGH-I747M will, after a couple of minutes, restart. This message will then appear: “Pass“. Now’s the time to unplug the handset from your laptop or PC.

Once there is no USB cord between your two devices, the phone will be updated to the Android 4.3 UMUEMK3 official firmware at last. The location of this tool is in the device’s About Phone; to get there, tap Settings. If you don’t see it there, we have a comment field below. Leave all your questions there and we will do our best to help.

As soon as you decide that you want your phone restored to its old ROM, you should revoke the upgrade following this guide by using the recommended NANDroid backup file.