Just when you thought smartphones with slider designs, like the Mi MIX 3, the Honor Magic 2 or the Doogee Mix 4 may be a thing of the past, it turns out that Vivo has filed for a patent on a phone with a slider mechanism to house the front-facing selfie camera. If implemented, the new design is expected to offer a true full-screen display in smartphones while eliminating the need for unseemly punch-holes, notches or popups. As can be seen from the image(s), the sliding portion lifts up to reveal what seems to be an LED flash at the back, but the one oddity that strikes you immediately, is that they seem to show no separate selfie-camera cutout on the slider.