Question

How does the fingerprint sensor in screens of some phones work?​

Answer 1

Answer:

it has a sensor that copy the heat and the pattern of your finger.

Explanation:

then your phone brain which is a digital computer remembers it and next time when you place your finger the computer allows the phone to unlock.

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Answer 2

Answer:

first we have to set fingerprint

it scans our fingerprint and it verifies our fingerprint