https://www.cnet.com/news/mate-x-huaweis-2600-foldable-phone-rivals-samsung-galaxy-fold-with-three-screens-5g-hands-on/

Huawei's vision for the Mate X is of a phone you mostly use in its "closed" position, but open up when you want to be entertained or more productive. There's a screen on the back that could be useful for taking selfies: The phone's four rear cameras have been codesigned with Leica.

The "main" screen configuration is a 6.6-inch display that Huawei thinks you'll use most. Unfold it outward to get an 8-inch edge-to-edge OLED display with no notch (there is a camera, though). When it's folded up, the back is a slightly smaller 6.4-inch screen and a sidebar with the rear camera array. In the open position, the sidebar becomes a grippable handle, which Huawei whimsically calls the "Falcon Wing" design because of its swooping shape. The idea is to hold the Mate X one-handed, and use your other hand to tap and swipe. Fold the phone closed again and one side aligns with the handle to give it all a flat look. And yes, there's still a bendable hinge.