ZTE introduced the foldable Axon M, and Samsung is also working on a similar device called Galaxy X. The latest manufacturer that might enter the race is Oppo, which just patented a similar phone design. It has an outward hinge that, once unfolded, will act as a part of the screen.
Patent entry by Oppo
The patent entry also suggests there will be a dual camera on the back of the unfolded Oppo. When closed, one of the sides can be used for making calls, while the other can be used for taking selfies with the front camera and what appears to be an LED flash.
The patent renders…