Darwinian evolution is speedrunning foldable phone development. “Z”-style folds from companies like the Huawei Mate XT collapse in a zig-zag pattern, exposing one side of the screen to the elements.

Following a previous teaser, it’s been rather unclear when Samsung planned to launch its “tri-fold” smartphone. Now, a leaker is offering some further details, claiming that the Samsung “tri-fold” ...