Announced alongside the Reno 16 series, the Bubble is a compact magnetic circular display that attaches to the back of supported Oppo smartphones. The tiny gadget basically acts like a secondary screen that helps in taking better selfies, which is honestly handy. It is small, light, and customizable, while also upgrading your selfies or group photos thanks to the better rear cameras. You’d usually have to guess the framing with your rear cameras, but this just makes it work. The Oppo...