https://www.techradar.com/news/the-samsung-galaxy-s10s-fingerprint-scanner-could-be-ultrasonic

We've heard multiple rumors suggesting that Samsung might include in-screen fingerprint scanners in both its upcoming Galaxy Note 9 and Galaxy S10 smartphones, but recent comments by company executives seem to suggest that bigger, bolder phone tech advancements may be on the horizon. 

According to noted leaker Ice Universe, Samsung's CEO Guo Minghao, along with its head of mobile DJ Koh, revealed some juicy pieces of information regarding the Galaxy S10 at an event recently, telling attendees that optical fingerprinting won't be used in the handset, as the company considers it a "bad user experience."