https://www.cnet.com/news/galaxy-s10-goes-ultrasonic-heres-an-early-look-at-its-likely-fingerprint-reader/

It's a sunny summer day in July, and I'm standing in a conference room in the heart of Qualcomm's San Diego headquarters, trying out an early -- and very rough -- prototype of the company's ultrasonic fingerprint reader, which Qualcomm says will show up in smartphones this year.

The technology is the same as that teased by DJ Koh, the head of Samsung's mobile business, at an event in China last year. And while Qualcomm declined to comment on any specifics phones using the technology, and Samsung remains mum on what will show up in the Galaxy S10, any phone embracing ultrasonic waves to read a fingerprint will have to work with Qualcomm.