By now, there is only one phone design that is known to “work,” and everything else is seen to be an experiment or an exercise in failure. Once upon a time, however, there was both beauty and chaos in diversity, with a new phone shape coming out almost every month or so (yes, we’re looking at you, old Nokia!). Although the age of smartphones has made the screen-only “candy bar” form factor the sole victor, there was one design, in particular, that almost stood the test of time....