My Galaxy S9 started shutting down when using fingerprint reader about 2 weeks ago - 10/3/2020. This started occurring after installing the latest security/software update from T-Mobile. Can't believe Samsung and T-Mobile can't figure out how to fix this glitch! Of course, as a workaround, I've turned the fingerprint reader off. This is not the solution as other have said, it's merely circumventing the issue that has no resolution so far!
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