I337UCUFMLD Android 4.4.2 KitKat Firmware on AT&T Galaxy S4 SGH-I337–Test Build - How To Guide

Samsung already pushed official Android 4.4.2 KitKat firmware to Galaxy Note 3 SM-N900 and Galaxy Note 3 SM-N9005, however if you are using AT&T Galaxy S4 SGH-I337 then don’t get upset. We now have leaked Android 4.4.2 KitKat stock firmware (ROM) for AT&T Galaxy S4 SGH-I337 that can upgrade your device to Android 4.4.2 KitKat from Android 4.3 Jelly Bean. Download I337UCUFMLD Android 4.4.2 KitKat firmware and flash it on AT&T Galaxy S4 SGH-I337 via Odin. Continue reading this guide to learn how to get stock I337UCUFMLD Android 4.4.2 KitKat firmware running on AT&T Galaxy S4 SGH-I337. Nearly all possible ways to update your device to this firmware is discussed here. One thing you should note that flashing or installing official firmware restore kernel hence your root access will be void, in short it will unroot it.

This Test build is shared by designgears (donate).

I337UCUFMLD Android 4.4.2 KitKat stock firmware not available on both OTA and Kies update. You must flash I337UCUFMLD Android 4.4.2 KitKat firmware on AT&T Galaxy S4 SGH-I337 manually. We will discuss all available update methods. 

Before jumping in, I think you should know few things first:

1- Will this trip Knox?
No.

2- Can you revert back to stock 4.3 if u want?
Yes! You can come back to MK2 stock firmware.

3- Will it allow future OTA's?
Yes.

4. Can I root this?
No! At least for now, since it comes with locked bootloader and someone yet to unlock it.

Known Issues:
Sporadic device reboot is observed when using video codec related function. This is due to an issue related to video codec.

I337UCUFMLD-442-screenshot

Warning: This tutorial is only for AT&T Galaxy S4 SGH-I337. Don’t try this guide on any other Android device. Also, we are not responsible for any damage caused due to the instruction given in this page. Try this at your own risk. However, it is very unlikely that your device will be damaged if you follow all the instructions as it is which are mentioned in procedure.

Pre Requisites:

Though official firmware restore all existing data but we recommend to back up your data first before proceeding to avoid any uncomfortable situation such as bootloop fix.

1. Backup your device data. You can follow our ultimate backup guide.

2.  Make sure your device have at least 60% battery power. You can install an app like Battery Notifier BT Free on your Android device to check it easily.

3. You already have USB Driver Installed for AT&T Galaxy S4 SGH-I337 in your PC. [Download USB Drivers]

4. Make sure USB Debugging is enabled otherwise you won’t able to transfer file between PC and AT&T Galaxy S4 SGH-I337. [Guide].

I337UCUFMLD Android 4.4.2 KitKat Firmware Downloads:
I337UCUFMLD_OneClick.zip (I337UCUFMLD_OneClick.exe)
Download: http://www.androidfilehost.com/?fid=23329332407566813
MD5: AD1150D2F94852912249F9D8476D461A
SIZE: 1.51GB

-OR-

I337UCUFMLD_Odin.tar.rar
Download: https://mega.co.nz/#!9pF0DZDA!nkZYmEN6aE2K_ZSMRmerksdqx9S8kwlQY4UnG3BDQ_c
MD5: D5C7470C240A9A74A6365C5575D78597
SIZE: 1.5GB

[Please Note: After flashing this firmware you will lost any installed custom ROM including CM10.2, AOKP, Avatar, Beanstalk, Omni ROM, Slim ROM, Pac-Man, Paranoid Android, LiquidSmooth or Carbon.]

How To Install I337UCUFMLD Android 4.4.2 KitKat Using OneClick Executable

  1. Power off your Android device. Wait 5-6 seconds for vibration to confirm complete switch off.
  2. Now, put the AT&T Galaxy S4 SGH-I337  in Download Mode by pressing and holding down the Home & Volume Down button together while pressing the Power button. A warning screen will come up; press Volume Up button to enter Download Mode.
  3. Extract downloaded I337UCUFMLD_OneClickBin.zip and then run (double click) I337UCUFMLD_OneClickBin.exe that located within extracted folder.
  4. Connect your phone to computer.
  5. Follow onscreen instruction and wait patiently when installation process start.
  6. Once done, your phone will reboot automatically.

How To Install I337UCUFMLD Android 4.4.2 KitKat On AT&T Galaxy S4 SGH-I337 Manually

  1. Download Odin v3.09.
  2. Extract Firmware zip (I337UCUFMLD_Odin.tar.rar) file that you downloaded earlier from above link, you will get a .tar.md5 file and some other files (optional).
  3. Extract Odin zip file and you will get Odin3 v3.09.exe along with few other files.
  4. Power off your Android device. Wait 5-6 seconds for vibration to confirm complete switch off.
  5. Now, put the AT&T Galaxy S4 SGH-I337  in Download Mode by pressing and holding down the Home & Volume Down button together while pressing the Power button. A warning screen will come up; press Volume Up button to enter Download Mode.
  6. Now run Odin3 v3.09.exe (see Step 3) as an Administrator because Admin privileges is required to complete the process smoothly (only applicable Windows Vista and higher).
  7. Now connect your device to your PC using USB cable. An “Added!!” massage will appear in Odin’s message box. If you don’t get the same then you should try another USB port (try USB port located in back in your desktop PC). If that too don’t work then you should reinstall the driver. If you successfully see the “Added!!” message in Odin then you are ready to go in next step. You should also see COM port with a number in Yellow if you successfully added your device.
  8. Now add following files as instructed below. You can find all this files under your extracted firmware folder.
    1. Add file with AP prefix to AP
    2. Add file with BL prefix to BL
    3. Add file with CP prefix to CP
    4. Add file with CSC prefix to CSC
  9. In Odin window, make sure only Auto Reboot and F. Reset Time checkboxes are selected.
  10. Double check everything that we mentioned in Step 8 & Step 9 above. Now, once satisfied hit the START button to begin the flashing process.
  11. Once flashing completed, your AT&T Galaxy S4 SGH-I337 will restart and soon you will see a PASS message with green background in the left-most box at the very top of the Odin. You can now unplug the USB cable to disconnect your device from computer.
Congrats! You just updated your AT&T Galaxy S4 SGH-I337 to Android 4.4.2 KitKat firmware. Go to Settings > About device to verify this firmware update.

Fix Boot Loop Issue On AT&T Galaxy S4 SGH-I337

If AT&T Galaxy S4 SGH-I337 stuck at booting animation for more than 10 minutes after Step 11 then follow below instructions:
  1. Go to recovery mode. To do so, press and hold the Volume Up, Home and Power buttons together.
  2. Now perform Wipe data/Factory Reset and Wipe Cache Partition task before selecting reboot system now function. In recovery mode use Volume keys to navigate between options and Power key to select the option.
Please note, performing wiping task will erase your device internal memory data and not external SD card data.

That’s it! Let us know about your latest Android 4.4.2 KitKat experience. [source]

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