The ZTE Axon M is a dual-screen phone that gives you an almost tablet-sized screen when unfolded. The Yota 3 has a full color screen on the front and an energy-efficient E Ink display on the back ...

As Xiaomi's blog post says, "the front, side, and back of the phone are almost entirely display." Xiaomi is calling this a "concept" phone, and while the company is being coy about details right ...