I have an S20+ and face unlock doesn't work. Yeah it might occassionally unlock your phone but "working" means it's consistent. The only consistent part of it is the inconsistent. I had an Apple 11 pro max and face unlock works on that phone. It works on the Google Pixel 4 too. It doesn't work on this phone. You can add an alternate look - doesn't help. You can retrain it - doesn't help. You can set every option available - doesn't help. You can try everything you find on Youtube, Reddit, etc. - doesn't help. The problem is Samsung software. I have an app called "Applock" that I use to secure certain apps on my phone. It works. It recognizes my face every time. I wish it could be used to unlock my phone but it can't. I can't find any other apps to use to unlock my phone with facial recognition. If I could I would switch. The finger print option is just as bad on the S20 so don't expect that to be a working alternative. Bottom line is Samsung really messed this one up and apparently doesn't plan on fixing it.
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I have the same issues. I tried the various things posted online. One thing with something running in the background does speed up the response but it does absolutely nothing to reduce errors. My face unlock is just as bad as the finger print reader. I use both and it's very frustrating how often I still have to type in a code because neither the face unlock nor the finger print reader would work. I've retrained by finger print using various methods. I've tried other fingers. I've tried every setting for the face unlock. I switched from an Apple 11 pro max where face unlock is a dream. Now it's a nightmare and finger print is not a useful option either. I wish Samsung would switch to using the core Google software for face unlock. The Pixel 4 is way better.
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