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Repair and disassembly information for Samsung's flagship S20+ Android smartphone, released in March of 2020.

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Can't register fingerprint. Get Operation Cancelled error

My fingerprint sensor stopped working. all updates are installed. I removed the existing fingerprints, and cleared the cache. When I try to register a new fingerprint, it briefly pops up the fingerprint scanner, then says, "Fingerprint Operation Cancelled."

Any ideas on what the problem could be?

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Same problem with my s21 ultra what should I do ?

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I fixed it! I'm not sure why this worked, but here's what I did.

I turned off the phone, then rebooted it into Safe Mode. Then I went into the settings and tried to register my fingerprint again. It took a few tries. It would error out in the middle of trying the first few times. About the 5th or 6th try, it let me register 2 different fingerprints.

I rebooted the phone into normal mode, and it has worked perfectly ever since then.

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JChancey will be eternally grateful.
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