clamshell

Oppo is developing a foldable phone with an inward folding flexible display. This clamshell phone has an ingenious hinge.

Hewlett Packard patents technology for the development of a flip phone with a flexible OLED display. Also applicable for laptops.

Oppo develops a compact foldable smartphone with a flexible screen on the outside. The flip phone is equipped with angle detection

The expected Samsung SM-W2018 flip phone appears on the Chinese Samsung support page, indicating a nearby launch.