We've seen all sorts of solutions to the problem of relocating the front camera to make room for more screen. There are popups and flips and even holes in the screen. But while we await that fabled camera-in-display tech, there is one solution that is both the simplest but the oddest one of all: removing the front camera entirely. That is what the nubia Z20 proposes by having screens both front and back. And, fortunately, it's one of the most affordable solutions as well.