The Nubia X is a high-end phone with a
Snapdragon 845, 6-8GB of RAM, and a 3,800mAh battery. The phone runs
Android 8.1 Oreo, but it's for the Chinese market. Thus, there are no
Google apps and the phone runs the
iPhone-y Nubia UI 6.0 skin.
With the tiny bezels, there's no room for a front-facing camera. Instead of taking a chunk out of the display or adding a mechanical slider, the Nubia X has a second display on the back. The front display is a 1080p LCD, and the back screen is a 5.1-inch 1520 x 720 OLED. The phone also has two fingerprint sensors on the left and right edges so you can unlock easily no matter which display you're looking at.
