https://www.siliconvalley.com/2019/04/15/hands-on-with-samsungs-galaxy-fold-make-peace-with-a-crease/

By Geoffrey A. Fowler | The Washington Post

Any new technology is bound to have wrinkles. On Samsung’s new Galaxy Fold, a phone that opens into a tablet, they include one prominent crease. It goes down the middle of the Fold’s remarkable flexible screen, like a pleat on polyester pants.