Xiaomi has announced the Mix 4, the first phone in the Mi Mix series to be announced in nearly three years. The Mix phones have always been about bezel-less designs with seamless screens, and the Mix 4 carries on that idea by commercializing a technology that Xiaomi has been working on for a long time: a selfie camera that’s located directly under the screen.
Xiaomi calls this CUP (Camera Under Panel) technology, though it’s similar to the under-display selfie cameras we’ve seen from other companies. Like Oppo and ZTE’s latest efforts, the Mix 4’s screen has a 400ppi area that lets light pass through to the selfie camera, which Xiaomi describes as “virtually invisible.” The camera is 20 megapixels and the display is a 6.67-inch 120Hz…