Android 6.0 Marshmallow Now Available for Note 4

Samsung Galaxy Note 4 Logo
Specs and full info
Samsung rolled out their latest firmware (Android 6.0 Marshmallow) update to GalaxyNote 4. The Android M or Marshmallow is one of the stable version that brings an enhancement not only in processing, but also in battery life too. Since it’s an OTA update, the latest firmware receives to all the Samsung Galaxy Note 4 models. Samsung’s update package also carries personal software for the Marshmallow operating system.
You can easily update it by going to your phone sittings > tap on about > tap on check update, Then wait for your phone to install updates it should restart survival times until update is do

Source : Google , Rooter15thenextdigit