Microsoft has partnered with Samsung closely with its Galaxy S series for a couple of years now. Microsoft even sells the phones directly with Microsoft apps preinstalled.
Given Microsoft is now building up to release its teased Surface Duo folding Android device, it makes sense that we are seeing the companies work together.
Calls on Your Phone use your Windows PC’s mic, speakers and screen to receive and make calls, and even transfer running calls between devices. You’ll need to be running Android 7.0 or above and, obviously, Windows 10 for it to work if you’re running the Insider build.
Otherwise, watch out for the worldwide update soon.