We have been sharing CM13 custom ROMs for a plenty of devices with you. You can now flash unofficial CM13 Android 6.0 Marshmallow on your Galaxy Note 3 too. The updated build of unofficial CM13 custom ROM is reportedly stable and bug-free. Follow this guide to update Note 3 to Marshmallow based CM13 custom firmware.

Note:The link works with Samsung Galaxy Note 3 LTE N9005. You can follow the steps with other Samsung Galaxy devices, but do not use this ROM zip file with any other device.

Before youupdate Note 3 to Marshmallow CM13custom ROM:

Backup any important datafrom your Samsung Galaxy Note 3as a complete wipe will be required during the flashing process.Enable USB debugging option on your device:Settings>DevelopmentOptions>USB debugging.Samsung Galaxy Note 3 N9005 must berooted, unlockedand installed with a recovery tool likeTWRPorCWM.Your device must be charged to at least 60% of power.

Update Note 3 to Marshmallow custom ROM:

Required files:download CM13 Android 6.0 for Galaxy Note 3 N9005 and save it on your computer. Do not extract the contents. Also download the Google Apps Package for your Note 3.

ConnectGalaxyNote 3 N9005 to your computer using a USB cable and copy the zip file to your phone’s SD card.Disconnect the USB cord andpower off yourSamsungGalaxyNote 3.Boot it into recovery mode bypressing and holdingVolume Up+Home+Powerbuttons together.Wipe data tasks: from CWM recovery menu, selectwipe data / factory resetand confirm the process. Then go on towipe cache partitionandwipe dalvik cache.From recovery menu, selectinstall zip fromsdcardfollowed bychoose zip from sdcard.Locate the unofficial CM13custom firmwareand confirm the flashing process.Once done, repeat the above step for installing GApps on your smartphone.After installation is done successfully, return back to main recovery menu and reboot your Note 3 N9005 into the new custom ROM. First boot takes a good 5 minutes so please be patient.

-Relevant:How to Update Note 3 to Android 6.0.1 Resurrection Remix Custom ROM