Ever since the CyanogenMod released the source code for it’s upcoming Android 6.0 Marshmallow build, many developers have begun porting it to their devices. Here is one such port for the Samsung Galaxy S4 that will let you update your device to the latest software from Android. This is an unofficial build though, and users may expect some bugs. However, a lot of functionalities seems to be working with this CM 13 release. This could be a great deal for those who want to test Marshmallow on their device.

The CyanogenMod ROM listed below comes with some some bugs and some of the features aren’t tested yet. Not much has been changed or added to the ROM though, just that the CM 13 source has been re-compiled for the device.

Moreover, bug fixes are expected with further releases and with more repo sync from CM 13, this ROM can be used as daily diver soon enough. With future updates, stability improvements can be seen. If you are getting curious and want to try the ROM, then here is a simple guide that will help you do so. The bugs are listed below. So stay tuned for further updates and let’s begin with the tutorial.

Warning: Warranty may be void if you root or install custom ROM on your device. We at DroidViews won’t be liable for any damage to your device whatsoever. We are not responsible if you brick or damage your device. Reader’s discretion is advised.

Bug Alert

What’s working:
Adaptive brightness
Notification LED: both channels (R,G,B)
Sensors: accelerometer, barometer, gyroscope, proximity, temphumidity
Sound, way better than CM12/12.1, for example instant screen lock sound when you press power key
Touch keys leds
Touch screen, including multitouch
USB: charge battery, ADB, MTP for file transfer

What’s not:
Camera: front and rear


Samsung Galaxy S4 CyanogenMod 13 ROM

  • CM 13 Marshmallow ROM — Download | File: cm-13.0-20151108-UNOFFICIAL-jflte.zip
  • Marshmallow Gapps — Download  | File: SLIM_MINI_GAPPS.BETA.6.0.BUILD.0.X-20151008A.ZIP


  • The listed custom ROM is compatible with Samsung Galaxy S4. Do not try it on any other device.
  • Make sure you have TWRP recovery installed on your device. For detailed custom recovery installation instructions get to this link and install the latest TWRP build.
  • You must have device drivers installed on your PC so as to transfer the ROM and Google apps to your device’s storage.
  • You must fully charge your device or at least to 60%, as the process may take a while.

Backup your Apps and Data
Before you proceed, make sure you backup all your data. This process will wipe all the data from your device except for the internal storage. Hence, a full backup or nandroid backup is recommended. Also backup all your internal storage files just in case anything goes wrong. Take a nandroid backup from the custom recovery before flashing the ROM.

How to Install Unofficial CM 13 ROM on Galaxy S4

  1. Download the Marshmallow CM 13 ROM from the download section.
  2. Now transfer the zip file into your device’s internal storage. Place the zip file where you can easily locate it.
  3. Now reboot into Custom Recovery (like TWRP). To boot into TWRP, first turn off your device and then press and hold volume down and power keys at the same time. If you see the TWRP logo, that means you have successfully booted into the recovery.
  4. It’s highly recommended that you perform a nandroid backup. To backup your ROM, tap on backup option in TWRP and select all the partitions including System, Data, Boot, Recovery, EFS and swipe right where appropriate, to backup.
  5. After performing the ROM backup, perform a full wipe. Return to the TWRP main menu and tap the wipe button and select Advanced Wipe. Then select Dalvik CacheSystemData, and Cache. Now swipe the confirmation button to wipe.
  6. Now go back to the TWRP main menu or home screen and tap on the install option. Navigate to the ROM file and select it.
  7. Swipe the confirmation button to proceed with the installation. The ROM will be installed.
  8. Now return to home in the TWRP and tap on the install option. Navigate to the Google apps zip file and select it.
  9. Swipe the confirmation button to proceed with the installation.
  10. Once installed, reboot to system.

If you see the new boot logo, that means you have successfully installed the ROM on your device. If you come across any boot loop or face system errors, try a factory reset from the recovery or you can always restore your previous ROM from the backup. If you are looking for root access on your new ROM, get to this page for latest SuperSU build.

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