ZTE nubia Z18S shown on video with a second screen on its back

The ZTE nubia Z18 was unveiled earlier this month with a 91.8% screen-to-body ratio - that's a lot of screen. But it's just one screen. If this video that shows the nubia Z18S is to be believed, a two-screen model is in the works. The second screen is on the rear and is much larger than what the Meizu Pro 7 had. It's large enough to run the full UI of the phone. The main benefit of that is that you can use the full camera app and get a huge viewfinder. As you may have noticed, there's no notch on the front display and, in fact, no selfie camera. Why bother when there's a capable dual...