Brian X. Chen, writing for The New York Times:
After I set up Samsung’s new Galaxy S10 Plus phone last week, I
showed it to my partner and said with atypical enthusiasm, “Check
it out — this phone has the fingerprint sensor built directly
into the screen.”
I pressed my thumb down on the screen, where the fingerprint
sensor was embedded. “No match,” a message on the phone read. I
pressed down again and got the same message. After five failed
attempts, it asked for a passcode.
“Great demo,” my partner said as she turned back to browsing
Instagram on her phone.
There are a bunch of other reviews that don’t mention problems with the fingerprint sensor, but Seifert and Chen had real problems.