Install Gummy Android 4.4 custom ROM for AT&T Samsung Galaxy S4

Flash Gummy Android 4.4 CM11 unofficial custom ROM for AT&T Samsung Galaxy S4

Android 4.4 has been launched recently and numerous developers have started to release new custom ROM based on it. This guide contains info on how to flash the Gummy Android 4.4 KitKat custom ROM for AT&T Samsung Galaxy S4 smartphone, so make sure to read the entire post in order to complete the process successfully.

Gummy KitKat 4.4 custom ROM is created by the Gummy developers team, and it is based on experimental CyanogenMod 11 builds. Expect to find some errors and bugs while testing this new custom ROM. More info about it can be found in the XDA thread here.

Now, those of you who wish to flash such custom ROM on their devices should read these guidelines first:

  • The tutorial works exclusively with the AT&T variant of Samsung Galaxy S4. The phone has the I337 model number, so you shouldn’t attempt to flash the files on any other different device.
  • Make sure that your phone is rooted and running a custom Recovery image like CWM or TWRP.
    - though it is recommended for you to use CWM, the TWRP should also work with this guide.
    - make sure that the latest CWM / TWRP Recovery versions are installed.
  • For this new ROM to install correctly you will need to apply a factory reset.
    - that will remove all data from system partition, while leaving the internal / external sdcards intact.
    - the factory reset process is mandatory, as otherwise your device will not boot in normal mode. The step can be found in the ‘how-to’ part of this article.
  • You will also need to create a full NANDROID Backup of the ROM that is currently installed on your device.
    - this will set a restore point for the phone.
  • If you want to backup data from installed apps, then you should use Helium tool from here.
  • Backup SMS text messages and APN Internet Settings using these Android small tools: SMS backup & restore | APN Settings Backup & Restore.
  • Sync all your Contacts info and People details with your default Gmail account.
    - check this guide here if you don’t know how to do it.
  • This post is for advanced users, don’t skip any steps and read the entire post before starting the installation.
  • Note that we cannot be held responsible in case you brick your device in process. Also, we cannot be blamed if you lose any important data files.
  • Make sure that the phone’s battery charge level is over 5o%.
  • If you can’t complete the update, then you can ask for help in comments.

How to update AT&T Galaxy S4 to Android 4.4 using Gummy KitKat custom ROM:

  1. Download the Gummy Android 4.4 ROM zip from here.
  2. Download the Gapps for this ROM from here.
  3. Connect the AT&T SGS4 with your PC via USB cable, then move both zip files to your phone’s internal storage.
    - disconnect your phone from computer when the transfer is complete.
  4. Power off your Galaxy S4 now.
  5. Boot your device in custom Recovery Mode.
    - if you don’t know how to boot CWM / TWRP Recovery, then follow our info here.
  6. Create the NANDROID Backup for the ROM that is currently installed on your AT&T Galaxy S4:
    - CWM: select ‘backup and restore’ option. Create the file and then continue to the next step.
    - TWRP: press Backup, rename the file you’re about to create. Swipe to confirm the process.
  7. Next, apply a Factory Reset for your device:
    - CWM: select ‘wipe data/ factory reset’, confirm.
    - TWRP: press Wipe, then swipe to apply such action.
    > Continue to the next step when done.
  8. Now, flash the custom ROM zip file:
    - CWM: select ‘install zip from sdcard’, after that select the ‘choose zip from sdcard’ option. Find the Gummy ROM zip and install it.
    - TWRP: press Install, browse the internal storage for the ROM zip file. Swipe to confirm installation.
  9. Repeat step 8 actions after the new ROM is flashed, but this time you need to flash the Gapps zip.
  10. Return to the main custom Recovery screen when both files are flashed with success.
  11. Reboot your AT&T Galaxy S4 in normal mode.
    - note that the first boot process might take at least 3-4 minutes to load all the new files, which is why you shouldn’t press any buttons until the KitKat home screen appears.
  12. Use your Google Account credentials in order to take control over your device. That’s it, you’ve managed to complete the tutorial and now you’re free to test all of its features.

If the files aren’t installed successfully or in case you do manage to flash them, but the phone doesn’t boot in normal mode, then you will have to power off the device by removing its battery. After a few seconds re-insert the battery back into its place and then repeat the entire tutorial once again. Make sure not to skip any steps.

If you cannot complete the tutorial, then it would be best for you to leave a detailed comment at the end of this post and we will try to come up with a viable solution for you.

If you don’t like the new ROM, then you can easily restore the device to its previous ROM using the NANDROID Backup file created in step 6. I hope you found this guide helpful and that you’re now testing the latest unofficial KitKat custom build on your smartphone.

  • Asher Jacobs

    does this work for galaxy s4 i337 MF3