Like most of the manufacturers, Samsung may take long before releasing the official Marshmallow update to its devices. The flagship phones will receive the updates first and then older devices like Galaxy S5, S4 or the Note series may follow. However, as the CM 13 sources are out, many developers have ported this ROM to their device. Here is an Android 6.0 Marshmallow based CM 13 ROM for the Galaxy S5. Although it comes with the Marshmallow source code, the ROM is still an early release.

The CM 13 ROM listed below has some bugs and force close of phone process can be found with this initial build. Not much has been changed or added to the ROM – just that the CM 13 source has been re-compiled for the device. However, bug fixes are expected with further releases. With future updates, stability improvements can be seen. The ROM cannot be used as a daily driver for now. 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. For more information, get to the XDA page from download section. So stay tuned 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:
Built from CM source, Service, Text, Data, Call, Audio, WiFi, Google Now, Bluetooth and more.

What’s not:
On first boot FCs but after that its fine, lots of CM features have not been merged yet, External, Video Recording


  • CM 13 Marshmallow ROM — Download | File: (278 MB)
  • Marshmallow Gapps — Download  | File: (107.1 MB)


  • The listed custom ROM is compatible with Samsung Galaxy S5 running on Qualcomm Snapdragon processors codename: kltexx, kltelra, kltetmo, kltecan, klteatt, klteub, klteacg, kltedcm, klte. Individual CDMA builds include kltespr, klteusc, kltevzw and GSM builds as kltedv. Do not try it on any other device or variant.
  • Make sure you have TWRP recovery installed on your device. For detailed TWRP 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.

Install Marshmallow on Samsung Galaxy S5

  1. Download the Marshmallow CM 13 ROM of your choice 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.

Also See:

Android Marshmallow for Galaxy Tab S 10.5 LTE (SM-T805)

For queries, comment down below. Like and share us on social platforms. If you need help with other devices, let us know.


  1. Too bad the klteatt variant can not run TWRP. I tried installing it once I got my phone rooted and it soft bricked it. There is a different flash/recovery tool needed for the ATT variant, search XDA if you do not believe me. You should ensure your story is 100% accurate … morebefore posting click bait!

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