The Galaxy S10 has the same in-display, ultrasonic fingerprint sensor as the S10+ does. Unlike some other reviewers, I didn't have any trouble with accuracy—as long as I hit it straight on, and that's the trick. Unlike with physical sensors, like the one on the Galaxy S10e, there's no obvious guide where to hit the Galaxy S10's on-screen sensor, and it's a relatively small target area. You can train yourself after a while, but hit it off-center, and you'll probably get a failure.
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