How To Install Android 4.4.2 Leaked Firmware on AT&T Galaxy S4 SGH-I337

This one is the leaked firmware and carrying build number I337UCUFMLD and a build date of January 2nd. Come with all the new and improved features which you can try on your Note 3. The new firmware comes with the new bootloader, so it’s not possible to downgrade to previous stock firmware. If you are the AT&T Galaxy S4 SGH-I337 mobile users and want to try this new firmware on your device, here is the complete guide which you can follow on your device and update your device with Android 4.4.2.

Your warranty is void if you follow the given instruction in this guide. We the team or the developers are not responsible for bricked devices, dead SD cards. Read all the instruction very carefully and Perform everything at your own risk.


This guide is only for the Samsung AT&T Galaxy S4 SGH-I337 android smartphone. Don’t try this method on any of other Android devices, It may hard brick your device. So, first confirm your phone model number in your android phone settings. To do this Go the Settings page of your device and check out the “About Device” option.


Before following the below Mention guide, It’s always recommended to follow our pre-requisites and requirement to stay safe.


Do take the Full Backup of your Android Apps, SMS, Contacts, Call Logs, Bookmarks. This one is one of the most important step that you have to follow, as we don’t want anyone losing their personal data or apps.


You need these drivers to connect your device with the computer to follow this guide. Without these USB drivers you can’t connect your device to the PC, first download and install these drivers on your system.


Now you need to enable USB debugging mode. Without enabling USB debugging mode on your device you can’t start the root, Custom ROM or Unlock process.


If your device switched off during this process, it could damage or brick the device. Make sure that your Android battery is full charge or near about 50-70% battery level.

After following the above mention steps follow the below mention guide one by one to proceed with the tutorial. All the above mention steps are very important, so do follow all the steps and do exactly what is told.


Step 1. Download the Android 4.4.2 KitKat leaked (N900AUCECMLG) here for Note 3 and extract he folder on your desktop.

Step 2. One the folder you will find a exe file I337UCUFMLD_OneClick.exe. This one is one click ODIN installed uploaded with the firmware. No need to install the ODIN application on your system to flash the firmware.

Step 3. Now power off you device and boot it in download mode to start the Flashing process. To do this Press and hold these 3 buttons together until you see Warning! screen: Volume Down + Power + Home.

Step 4. Once your device is in download mode, connect it to your Windows PC with USB cable and run the I337UCUFMLD_OneClick.exe (Same file that you downloaded on step 1).

Step 5. Now click the Start button to begin flashing leaked firmware on your AT&T Galaxy S4 SGH-I337, and wait until you see a PASS! message in Odin’s apps left box. See the screenshot below:-

Step 6. Once the pass message is visible on the ODIN app screen, you phone will automatically reboot. Now you can disconnect your device from the PC.

Now your AT&T Galaxy S4 SGH-I337 is updated with Android 4.4.2 I337UCUFMLD Firmware and you can disconnect your phone from PC.