Minimal Samsung Galaxy S8 mockup based on my previous Samsung S8 outlined wireframe mockup (Also free) - and inspired by @Ciel.w beautiful shots.
There's a light version as well.
Fully customisable and free to use however you wish without any attribution.
It's still 1/4 th of the original resolution (@0,5x) if you plan on putting real designs in it.
Larger view and source file in attachments.