Foldable phones, step back: Here comes a phone that expands on demand

Phones that you can fold and unfold like a book? Ugh, that’s so 2019… At least, that’s what Oppo, the biggest smartphone maker in China, would say. BBC were recently able to get their hands on some of the first working models of this phone (after its development was publicly announced a few months ago), and released a video to show how it works.