Chinese website CNBeta has published photos that allegedly presented a prototype of a smartphone Moto X, the fourth generation. As you can see, the smartphone is enclosed in a metal case, the design of which differs slightly from the design of the current generation Moto X Style.
Moto X 4th Gen received a redesigned camera module, protected by a great glass. You can also note the two-tone led flash. We can assume that the top and bottom of the rear panel is made of plastic for better signal reception.
However, now we are talking about the prototype, which is tested by engineers, and the final version of the design may differ. Specifications were not disclosed.