https://www.theverge.com/circuitbreaker/2017/12/15/16779916/vivo-fingerprint-sensor-embedded-in-screen

Earlier this week, Synaptics announced that it's cracked the problem of embedding fingerprint sensors into displays and is mass-producing the tech for a “top-five” smartphone vendor. Now we know the identity of that vendor: it's Vivo.

In a post for Forbes, analyst Patrick Moorhead detailed his experience with a pre-production Vivo phone equipped with the technology. Moorhead describes the sensor as “fast and simple,” while Synaptics claims it's twice as fast as 3D facial recognition like Apple's Face ID — though that'd be a hard thing to realistically measure considering the different mechanisms that each system uses in practice.