The under-display front-facing camera may be a smash-hit spec among flagship phones going into 2021. A new leak may prove OPPO is taking it seriously by combining it with another state-of-the-art design feature: a display that curves pretty much all the way down to the rear panel. Therefore, it would combine 2 kinds of extra-premium screen technology in 1 phone.
https://www.notebookcheck.net/OPPO-patents-a-phone-with-a-waterfall-display-and-an-under-display-selfie-camera.497549.0.html