The NEX 3 and 3S are premium smartphones from the OEM Vivo with profoundly curved or "waterfall" displays. Now, this company has patented a new phone design with what could be the next generation of the same technology. It has a punch-hole camera, whereas its possible predecessor was edge-to-edge thanks to a pop-up selfie module.
https://www.notebookcheck.net/Vivo-patents-what-could-be-its-next-flagship-phone.490067.0.html