Smartphone bezels have been getting smaller and smaller, but one of the first smartphones to push these boundaries is the original Xiaomi Mi Mix. The Mi Mix 3 is the third iteration of the Mi Mix series that pushes the limit of bezels not by notches, nor below-the-display selfie cameras, but instead puts the camera literally behind the screen. Well, it only hides behind the display when you aren't using it and slides up when you, well, slide the phone open! As phone makers try to figure out the best way to make a full-screen phone, we get to see what kind of form factors they experiment...