One of the few truly innovative features we saw in smartphones this year was the in-display fingerprint reader. The new technology was most notably used by OnePlus and Huawei in their latest flagship phones, the 6T and Mate 20 Pro respectively, offering users that prefer to use their fingerprint as an unlocking method to do that by conveniently placing their thumb where it naturally goes on the display.This first generation of in-display fingerprint readers have the so-called optical scanners that use light from the display itself to basically take a picture of your thumb and compare it ...
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