Download Android 7.0 Nougat firmware for AT&T S4 SGH-I337 [UNOFFICIAL CM14]

Today here at we are going to flash UNOFFICIAL CyanogenMod 14 based Nougat ROM on AT&T Galaxy S4 SGH-I337. Galaxy S4 is an older device and Samsung has already support it will stay on the Lollipop update forever with no major update except a few tweaking updates. Yet AOSP developer never stop their work and continue to release custom ROMs carrying the latest firmware so the AT&T S4 SGH-I337 is going to taste the same firmware update via UNOFFICIAL CyanogenMod 14 ROM.

The ROM is based on Android 7.0 Nougat and this is not the first CM14 build for AT&T S4 SGH-I337 but it is already available for a wide range of devices like this one. Here at we will help you on complete installation of CyanogenMod 14 ROM on your AT&T S4 SGH-I337 by following the same process we have previously used for other devices.

How to install Android 7.0 Nougat on AT&T S4 SGH-I337 via CM14 ROM

Disclaimer: This guide includes flashing custom ROM on your device, it is not an official firmware but will flash the custom firmware. The writer is not responsible for any damage happens to your device during the whole operation neither we are forcing you to perform such operation.

Before you begin:

Installing custom ROM on your device needs some early preparations to be made and these preparations include;

A custom recovery is the most necessary element while installing custom ROMs or any .zip file in your device so a custom recovery like ClockworkMod or TWRP must be installed on your device or simply

Visit our guide to flash TWRP on AT&T S4 SGH-I337

Android USB drivers for your device should be installed on your PC, or you can download the latest USB drivers for your device from the below provided link.

Download USB drivers for Samsung

Create a Backup of your complete Android device

Backup is the most necessary part for your device you need to create a Nandroid backup of your device through custom recovery. We prefer Nandroid backup over other many apps because you don’t need to download multiple backup apps for specific purpose, the Nandroid backup will let you create backup of your device including; Messages, call log, settings and calendar including whole Android OS. Click the below link to create a Nandroid backup.

How to create a Nandroid backup/restore of your Android device

You can easily restore your backup when ever you wish to do so, this is good in aspect if your device accidentally met some issue during the flashing process.

Keep your battery charged or at least your device should contain at least 80% charge before the flashing operation.

If the PC is unable to unable to detect your device after even after installing Android USB drivers for your device, then you need to perform one more step,

Enable USB debugging, go to Settings >> Developer options >> USB debugging.

Once you done with the above preparations now it’s time to flash Android 7.0 Nougat CyanogenMod 14 ROM on your AT&T S4 SGH-I337. Just go ahead and follow the steps in sequence to avoid any issue while flashing Android 7.0 Nougat CyanogenMod 14 ROM on AT&T S4 SGH-I337.

Process to install Android 7.0 Nougat on AT&T S4 SGH-I337 via CyanogenMod 14 ROM

The Android 7.0 Nougat ROM for AT&T S4 SGH-I337 is the initial build released by the developers so you can’t expect everything to be working perfect, however you can visit the XDA forum for status of ROM. If you think you are good enough to perform such operation with your device then what are you waiting for just go ahead and follow the below description.

Download the Android 7.0 Nougat CyanogenMod 14 ROM for AT&T S4 SGH-I337 from below along Google apps.

Once you successfully downloaded the Android 7.0 Nougat CyanogenMod 14 ROM along Google Apps on PC, Now connect your device to PC and move the downloaded files on the internal storage of your device. [If you downloaded it via phone then skip this step]

Its time to reboot your device into recovery Mode, to do so you can search for it or use hardware buttons combination. (If your device is rooted then its super easy, just visit Google Play and download any third party reboot app for this purpose)

Once your device successfully boots into recovery mode, select the downloaded Android 7.0 Nougat ROM .zip file and confirm it by swiping the slider for (TWRP) or yes for (CWM).

Wait for the process to complete, now perform the same step to flash Google apps zip file on your device.

Once successfully done with the installation procedure simply reboot your device, please note the first boot up may take 5 to 7 minutes so be patient as things needs to be settled up for boot.

Download Android 7.0 Nougat CyanogenMod 14 ROM for AT&T S4 SGH-I337

Download Google Apps [Gapps]

Also see: Download Google Pixel Launcher, icon, wallpapers and more apps for Android

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