Source: Android Central
Best answer: Yes, the Samsung Galaxy S21's fingerprint sensor will work with the pre-installed screen protector and most third-party film screen protectors. However, Samsung's ultrasonic fingerprint sensor has had trouble with tempered glass protectors in the past, which may continue with some models.
- Samsung's latest masterpiece: Samsung Galaxy S21 ($800 at Samsung)
Do you read?
Underscreen fingerprint sensors are the way of the future now. Most premium smartphones carry them and Samsung is no exception. However, just two years ago, after the debut of Samsung's ultrasonic fingerprint sensor, reports came out that some third-party tempered glass screen protectors caused the sensor to fail. So, it's important that you protect your screen, but it's also important to pick the right screen protector for your phone.
The Samsung Galaxy S21 comes with a film screen protector pre-installed on the device, and that will most assuredly work with the ultrasonic fingerprint sensor. Third-party options can get a little dicey, but we'll narrow down some good options for you below.
What are the options?
First and foremost, we recommend leaving the pre-installed screen protector in place. It will be a film protector and capable of repelling minor nicks and scratches. If factory-installed screen film is not for you, we have some other ideas for you to consider.
There's always the option of not using a screen protector at all. Many of the best Galaxy S21 cases will have lips over the front of the phone that will keep the screen safe should you drop it. That's a good solution to prevent breakage, but it won't do you much good if you accidentally drop your phone in the same pocket or pouch as your keys.
Your fingerprint sensor should work just fine with any of the best Galaxy S21 screen protectors, be they made of plastic or film. Some third-party film protectors will be a bit thicker than the factory-installed film which will help protect your screen against deeper scratches. They can sometimes be tricky to get on bubble-free, so that's something to be aware of.
If you would prefer a tempered glass protector, you might want to look at the company Whitestone Dome. When fingerprint sensors started to fail on the Galaxy S10 line of phones, Whitestone Dome came to the rescue with its own glass screen protector that worked perfectly. Whitestone uses a unique curing system in its glass construction that allows the fingerprint sensor to function properly.
Overall, we definitely recommend some kind of screen protection for your S21. The phone is pretty great, and you will want to keep it as safe as possible.
Latest and greatest

Samsung Galaxy S21
Latest and greatest
Samsung is both upping its game and consumer appeal with better specifications and lower pricing. Even the base model of the Galaxy S21 comes with the Snapdragon 888, 120hz screen, 128GB of storage, and 12GB of RAM. Just shut up and take my money!
We may earn a commission for purchases using our links. Learn more.

Keep your Galaxy Note 20 Ultra shatter-free with these screen protectors
With the Note 20 Ultra, you're getting one of the best displays currently available on a smartphone. Want to make sure it stays that way? Get a screen protector!

Here are the best clear cases for the Samsung Galaxy S21 Ultra
While you'll want to protect your fancy new Samsung Galaxy S21 Ultra smartphone and its gorgeous 6.8-inch screen, you'll also want to show off the sleek device in whatever color finish you choose. A clear case helps with both, so we rounded up some of the best you can buy this year.

No microSD on the Galaxy S21? No problem!
With the Galaxy S21 series, Samsung has ditched the microSD card slot on its flagships. That means you'll have to rely on an external SSD or buy a dongle to connect an existing microSD card to your phone. These are the best microSD alternatives for your Galaxy S21.