The idea here is that you can stick to the cute, ringed display for your daily tasks, but when it comes to selfies or video calls, just turn on the phone to make use of the 12 megapixel main camera (f / 1.79, Sony IMX363 CMOS), along with the smaller screen beneath it. Both 6.39-inch and 5.49-inch AMOLED touch screens pack a 1080p resolution, which is lower than Quad HD offers from others, but still plenty for most users.
Unfortunately for Vivo, it's not the first company to realize this concept. The Nubia X from the end of October also uses a secondary self-help screen as well as customization and adds game controls (think the rear touchpad), but it uses a smaller 5.1
It's also easy to switch between the two screens on this NEX: You can either pull out the Control Center from the bottom and touch the shortcut at the bottom right, or enable the trim movement in settings and drag from the left edge of both screens. Nonetheless, I prefer personal implementation of dual-fingerprint readers on Nubia X, but obviously not a choice on the Vivo device.
It's unnecessary to say that the camera comes with many dedicated software features, including the usual AI facial combat and facial shape. Interestingly, it can even make body shape if you are very conscious of yourself.
Another unique feature is the Time of Flight 3D camera, used faster (0.35 seconds) and more secure (300,000 dots) face detection and enhanced face shine. It also works as an AR tool tool – just like Google's project tango spied back in the days.