It's been almost eight months since Google released Android 6.0 Marshmallow, but over 90% of active Android devices still haven't been upgraded - and many never will be.
Mobile carriers tend to be particularly slow with rolling out OS updates, and Verizon is no exception. Big Red did release an update for Samsung's Galaxy Note 4 back in February, but owners of the device were left waiting for Marshmallow.
Now, though, Verizon has finally released Android 6.0.1 for the Galaxy Note 4, bumping its software version up to MMB29M.N910VVRU2CPD1. Along with all the improvements that Google has included in Marshmallow, Verizon's update also comes with support for Wi-Fi Calling, Ultra-High-Quality Audio (UHQA) and Android for Work.
Be aware that Amazon Music has been removed as a pre-installed app; this shouldn't remove the app from your Galaxy Note 4 if it's already installed, but if you ever reset the device to 'factory settings', you'll have to download Amazon Music again manually.