The Samsung Galaxy S10 (Galaxy S10 Plus) ultrasonic fingerprint sensor seems to improve using this method. Give it a try yourself and let me know if you have similar results. I'd still say the typical rear scanner outperforms in-display fingerprint tech in most cases. At least the Galaxy S10 implementation offers greater security when compared to it's in-display competitors.
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Samsung Galaxy S10 Fingerprint Trick ─ Unbox Therapy
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