New Delhi, June 7 -- The front camera has always been the compromise you made because the good camera was facing the wrong direction. Every photographer, every vlogger shooting themselves on a tripod, every person who has squinted at a blurry selfie and thought "the rear camera would have nailed this" has run into the same wall: you cannot see what the rear lens is capturing when it is pointed away from you. OPPO's answer, launched in China on May 25, arrived not as a software trick or a folding phone gimmick but as a small circular screen that clips to the back of your phone and shows you exactly what the rear camera sees.

the kind of workflow tool that content creators used to approximate with separate Bluetooth clickers and a prayer t...