I337UCUFNB1 Android 4.4.2 KitKat Firmware for AT&T Galaxy S4 SGH-I337- OTA, Kies and Odin Installation Guide

I337UCUFNB1 Android 4.4.2 KitKat Firmware Last Updated on 28-Feb-2014. Download and install the latest UCUFNB1 4.4.2 KitKat official firmware update on AT&T Samsung Galaxy S4 SGH-I337 (USA AT&T). Samsung started rolling out an OTA update about the firmware. The latest firmware build version number is I337UCUFNB1. The device was released with Android 4.2.2 Jelly Bean and later updated to Android 4.3 Jelly Bean. This is the first official Android 4.4.2 KitKat firmware update for the device. If you own the device and not yet updated this latest firmware, then update the same using our simple tutorial below. The below guide will help you to download and install the I337UCUFNB1 Android 4.4.2 KitKat Firmware manually through Odin along with OTA and Kies installation guide.

AT&T Samsung Galaxy S4 SGH-I337

The latest Android 4.4.2 KitKat is definitely a great update for the AT&T Galaxy S4 I337 users. The latest firmware will upgrade the OS version to 4.4.2 KitKat and will bring many new features and performnace tweaks.

Android 4.4.2 KitKat comes with many new features than the previous Android 4.3 Jelly Bean, some includesCamera shortcut on lockscreen, White icons in status bar, Performance improvements, Transparent status bar, Improved keyboard layout in landscape orientation, Select between the stock messaging app or Hangouts for SMS and MMS, Select between TouchWiz or other launchers through settings, Wireless printing, Updated Google apps and many more.

So, want to update your Galaxy S4 I337 to the latest UCUFNB1 Android 4.4.2 KitKat firmware? To install in official way, either you can go for  OTA (over the air) from Settings-About Phone-Software Update or download firmware through the Samsung Kies utility. However, most of us prefer manual way to update official firmware. So, in this article you’ll find step by step manual guide to update the latest Android 4.4.2 UCUFNB1 firmware on your Galaxy S4 I337 through Odin.

Also Check: Samsung Galaxy S4 SGH-I337 Full Specifications and Features  

Important Note:

"The firmware is released only for the Samsung Galaxy S4 SGH-I337 model, so don’t try this in any other android device. Check your device model number from Settings-About Phone. Also the tutorial is based on Windows PC. Follow all the pre-requisites, procedures and steps carefully to avoid breaking your phone".

Update I337UCUFNB1 4.4.2 KitKat Official Firmware on AT&T Galaxy S4 SGH-I337 via OTA (Over the Air):

  1. Turn on Internet connection/connect to WiFi on your device (should have stable Internet connection)
  2. Go to Settings>>About, and tap on the Software Update Option from there (If its show “The latest update have already been installed” message, then your device haven’t receive any OTA yet, check back later or try installing through Kies.)
  3. Tap OK to start the download and installation process
  4. Once done, your device will reboot automatically

Update I337UCUFNB1 4.4.2 KitKat Official Firmware on AT&T Galaxy S4 SGH-I337 via Samsung Kies:

  1. Turn on Internet connection/connect to WiFi on your device (should have stable Internet connection)
  2. Download and Install Samsung Kies Utility on your PC
  3. Connect your device to PC through USB
  4. Open/Run Samsung Kies, it should automatically detect your device
  5. At the Samsung Kies home screen, you’ll see New Firmware Upgrade is available notification (If it show- “This is the last firmware”, then your device haven’t received the latest firmware on Kies, check back later or try flashing manually through Odin)
  6. Click on the Firmware Upgrade button to start the update process
  7. Follow onscreen instructions
  8. Once done, your device will be reboot automatically
  9. After reboot, you can disconnect your device from PC

Download I337UCUFNB1 Android 4.4.2 KitKat Official Firmware

USA (AT&T): Odin flashable download link will be added soon (For now, you can follow the above OTA and Kies installation guide to update your device)


  • Check battery percentage, your device should have at least 60% battery power
  • Turn on USB Debugging mode, go to Settings-Developer Options-USB Debugging
  • Backup important data and settings to external storage- follow this guide
  • Install USB driver for your device on your computer- Download Samsung USB Driver

Points to be noted:

  • If you are using any Custom ROM such as- CyanogenMod, Paranoid Android, AOKP, SLIM ROMs etc, then it’ll replaced by this official Stock ROM
  • Custom Recovery (CWM or TWRP Recovery) will be replaced by Stock Recovery
  • After flashing official firmware, your device will no longer belongs to rooted device. However you can root your device any time after flashing the firmware.
All the above pre-requisites are very important and must follow before proceed to installation guide. Hope you get all the above points. Now, go through the below tutorial to install Android 4.4.2 I337UCUFNB1 official firmware on Galaxy S4 I337.

How to Install Android 4.4.2 KitKat Official Firmware on Galaxy S4 I337 through Odin:

  1. Download Android 4.4.2 UCUFNB1 Firmware for Galaxy S4 I337 from the above list
  2. Download Odin
  3. Switch off your phone and boot Galaxy S4 I337 into Download Mode by pressing and holding the Volume Down+Home+Power buttons (long press until the boot screen appear), now press Volume Up key to proceed to Download Mode.
  4. Extract the downloaded Odin3.07 zip file and run the Odin3 v3.07.exe file as an administrator (Right click on the .exe file and click on Run as administrator)
  5. Now connect your Galaxy S4 I337 to your computer via USB cable
  6. In Odin3 screen, you should see a COM Port number like “0:[COM7]” at ID:COM section and “Added!” text at the message box. This means your device has been detected by Odin3.
  7. Make sure that, only the “Auto Reboot” and “F. Reset Time” options are checked.
  8. Now, extract the downloaded firmware zip file, you’ll find a firmware file with extension .tar.md5
  9. In Odin screen, click on PDA button and select the firmware file with .tar.md5 extension (The firmware file look something like: I337XXDLJ5_I337ODDDLI7_INU.tar.md5)
  10. Now, click on the Start button to begin the installation process, wait few moments.
  11. Once completed, you would see “PASS!” message in ID:COM port having green background
  12. Your phone should automatically reboot after completion
  13. You can now disconnect your phone from computer
  14. Finish
Congratulations! your Galaxy S4 I337 is now updated to the latest and official Android 4.4.2 KitKat firmware. Hope you successfully completed the installation guide. If you followed everything as mentioned in the above tutorial, then your your Galaxy S4 should now running on the latest Android 4.4.2 KitKat build version UCUFNB1. You can confirm the firmware update details from Settings-About Phone. You can contact with us using the comment form below, if you find any problem with the above tutorial and download link and also share your experience with us.


  1. I have a question: I bought my phone unlocked on Amazon (SGH-I337) If I upgrade using through Odin (since OTA says I have the latest version and Kies says "Your device's current firmware version is not supported to update firmware via Kies") will I lose the unlocked status of my phone? Thank you.

  2. I don't see the link from where I can download the firmware file.

  3. This comment has been removed by the author.

  4. I have a sim unlocked sgh-i337 phone, does this update will lock my phone? If so, how to unlock it?

    1. no you will not. once the phone is sim unlocked is unlocked forever regardless of the updates or custom roms you throw at it

  5. This comment has been removed by the author.

    1. This comment has been removed by the author.

  6. This comment has been removed by the author.


    I337UCUFNB1 4.4 Stock Odin Tar: https://mega.co.nz/#!88MSyQoJ!8zxUFpiXhteaLDNemgqRbBSzy6gZJHRCPRW2YndIO4g
    MD5: 5BFE6BE67AA86DF8C0ED041342DFD9FF
    (This is an "All-in-One" file, flash in PDA Slot in Odin)

    I337UCUFNB1 4.4 System Dump: https://mega.co.nz/#!ltdFSJIQ!T9qH5VAYJ44l3ekljb_nh332_VjfDGoBUUY6Y2dq9J0
    MD5: F8CA574A4620F5F9490AF775C31C470E

    XDA DEVELOPER FORUM: http://forum.xda-developers.com/showthread.php?t=2674223

    1. I want to upgrade my sgs4 i337 runing 4.2.2 to the NEW KITKAT 4.4 but which odin flashable links do I have to install? The ALL in One file? or the System Dump? or Both?

  8. Why author is removing the comments? there is some kind of issue.

  9. Thaaaaaaaaaaaaaaaaaaaaaaanks, its give new life to my i337, many thanks

  10. If you haven't already downloaded 4.4.2 on your AT&T Galaxy S 4, don't. I installed it and I now have more bloatware than what was on my phone when I originally purchased it. New apps include Beats Radio, ATT Messenger (another sms app. Really AT&T, as if we didn't already have enough of those?) and ISIS Wallet (similar to Google Wallet). Total bloatware count is now 21 useless AT&T apps I don't use and cannot delete. Thanks AT&T, you're the best......NOT!

  11. Fuck att and their behemoth bloat boner

  12. Avoid update to NB1 or NC1

  13. The download is a tar.rar file and not an md5. Can I please get an md5 link ?

  14. will this work to down grade from lolipop to kitkat


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