Later this year, Microsoft will be releasing new high-end phones.
The device, which you can see above, is an engineering prototype, so that black shell is not what will ship with the phone.

The back of the phone will only display the Windows logo as well, no Microsoft name or Windows 10 (at least per the devices we have seen) and the front of the phone has no physical buttons at all; virtual keys are the way forward for this phone.

The phone will support Windows Hello, Continuum and all of the other high-end features, and will be arriving later this year, likely in September or possibly October.

Courtesy: Neowin.