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I read that differently -- that the scanning of a working finger leaves an imprint in the gel, and this is what is read from the subsequent scan. This would mean that you couldn't just grab somebody's S10, put a gel screen protector on, and get into the device. You need to have them successfully unlock the device first.

With this in mind, they would not be completely off the mark.

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That does not appear to be the case.

There is a video circulating these comments. It shows someone register their finger without the screen, slap the screen protector over top and unlock with a different, previously rejected finger.

Edit: https://twitter.com/sta_light_/status/1184475413252210688?s=...

If the fingerprint somehow gets embedded into the screen protector, is it possible that the screen protector is "tainted" with the fingerprint from previous usage?

I'm not dismissing the claims, but I would like to see if the behavior can be replicated with a brand new screen protector.

Yes, 100% agreed.

Yes, I saw that and it definitely made me rethink my theory. Either it's trapping a fingerprint under the protector or this is not the first run with the screen protector and it's "tainted" with a fingerprint in it now.

I'm unusually eager to know the full story!

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