The Samsung Galaxy S20 series of smartphones have an in-display fingerprint scanner on the lower half of the screen. Samsung previously did this with the Galaxy S10 and Galaxy Note 10 series in 2019. Like those phones, the Galaxy S20 fingerprint scanner uses ultrasonic technology. In other words, when you press your finger on the scanner, it uses very high-frequency ultrasonic sound waves to map out your fingerprint.
This technology was a bit problematic when the Galaxy S10 phones were launched. Samsung was forced to release a software patch for those phones shortly after they went on sale to improve the speed and use of the scanner. This largely solved the problem, and Samsung continued to use the technology for the Note 10 and Galaxy S20 phones.
Will the Galaxy S20 fingerprint sensor work with a screen protector?
If you like the convenience of the in-display fingerprint scanner, you should know that they don’t always play well with screen protectors. So, will the Galaxy S20 fingerprint scanner work with screen protectors?
In short, the answer to that question is, “Most of them, yes.” If you are placing a film or plastic screen protector on top of the Galaxy S20’s display, you should not experience any issues when using its in-display fingerprint scanner.
However, that answer might change if you use a tempered glass-based screen protector like the one pictured above. While they offer more protection for your display than a plastic or film protector, some tempered glass-based products can mess with the ultrasonic tech in the fingerprint sensor. In general, the thinner the tempered glass screen protector is, the better it will work with the Galaxy S20 fingerprint scanner.