Flip phones were designed from the communicators in the original series of Star Trek. If you're interested in the more theoretical side of the Beeb's article then I'd recommend Michio Kaku's book " Physics of the Impossible "[1] (he also did a TV series on this topic but that wasn't nearly as good in my opinion) [1] https://www.amazon.co.uk/d/cka/Physics-Impossible-Scientific...
Take everything kaku writes with a grain of salt.
He frequently borders dangerously on charlatan.