Lenovo patents vertically foldable phone
Back in September 2018, Lenovo filed a patent at WIPO (World Intellectual Property Office) imagining a foldable smartphone with a vertical fold. It resembles Motorola's Razr smartphone to some extent because it has a secondary screen.
It has a big hinge on the back letting you choose the flex point so you can fold it halfway or almost fully. This way part of the screen remains visible and usable. The idea is reminiscent of Sharp's design that we saw last week.
Lenovo's foldable phone renders based on the patent
By the looks of it, the bezels are big enough to accommodate the front-facing camera and the earpiece along with the usual sensors and the back has only one camera pictured.
Of course, this is just a preliminary design and could change upon release if the project sees broad daylight at all.