https://www.theverge.com/circuitbreaker/2018/10/31/18047142/nubia-dual-screen-phone-bezelless

As if October wasn’t already packed full of new product announcements, China’s Nubia is today hosting a launch event for its new flagship called the Nubia X. Leaked ahead of the big unveil, this device takes a pretty extreme approach to solving the notch problem: it puts a second display on the back, removing the entire need for a front-facing camera. We’re not talking e-paper displays like you had on the YotaPhone, this is a full-sized color screen, albeit with some fat bezels around it. So you can simply flip the phone around to its back to take your selfie with the main camera.

The most impressive thing about the Nubia X’s second display is the way it totally disappears when switched off. You can see a good demonstration of how that screen blends into the colorful glass back of the phone in the video below.