Oppo’s Bubble selfie screen is crying out for Qi2

The Oppo Bubble is a smart second screen for your phone, one that can be attached and detached at will, connects wirelessly, and serves as either a selfie screen or a wireless camera remote. It’s the best version of this idea I’ve used yet, but also a frustrating reminder that it could be even better if only Oppo and other Android OEMs would get on board with Qi2 . The Bubble is a bit like a smaller — much, much smaller — version of Insta360’s Snap or the Dockcase Selfix phone case . It’s a tiny puck, just 7mm thick and 27.5g, with a 1.73-inch circular OLED touchscreen. It has its own 550mAh battery — though Oppo won’t say how long to expect that to last — and because it connects to your phone wirelessly, there’s no need to worry about a cable, though there’s a USB-C port for charging when you need to. It’s pointedly simple. You can access the phone’s camera to take photos or record video, including cycling through a few basic zoom options across the rear lenses. The screen is circular, so it’s not the ideal way to frame a rectangular photo, but it works well enough. And while it’s a touchscreen, there’s no support for tap-to-focus. Slap the Bubble on the back of your phone with the help of a magnetic mount and it becomes an easier way to take selfies with the rear lenses. But with 33 feet of range, it can also double as a camera remote. …