It’s called Cartier Millenaire. The form factor isn’t very different from the other renders made by this designer.
This model is supposed to be both fashionable and sophisticated and for now these are preliminary shots of the model. The Cartier concept phone looks a lot like a piece of jewelry, a makeup kit, or something else in the same range and area. This is a bit of a flip phone, since there’s a very slim part that can be lifted.
It mimics a futuristic spaceship of sorts. Since this is a luxury device, it may well be adorned with rare metals, jewels and maybe exotic wood and crocodile skin.