I am shocked and really sad about this. The fingerprint scanner on my brand new S21 Ultra IS TERRIBLE!!! See the YouTube video I made to show it took me about 100 tries to add my left thumb, then it failed. VERY BAD Samsung!!! https://youtu.be/4Mp8ECNUpgQ
I have managed to scan 3 of my right hand fingers, and it almost never unlocks on first try, regardless of finger used, comparing with my Note10+, the poor performance is identical, so is the feel and way the scanner works, so I am sure they are the same scanner and am sure that the Exynos does DEFINITELY NOT have an ultra-sonic fingerprint scanner.
Maybe the Qualcomm version is great, but this is extremely disappointing and is the reason I returned my Galaxy S20, Galaxy Note 20 Ultra upgrades after a few days, and now it looks like I will be returning this phone. It is not a substantive upgrade on my Note10+ the same annoyances.