I have an S21 Ultra. I watched the video before installation and then followed the written instructions. I personally had no trouble installing this screen protector. I've always had tempered glass screen protectors on my previous Galaxy S devices, but after seeing the reviews and the location of the top speaker for the S21 Ultra, I was worried about glue getting inside the speaker, so I decided to try this screen protector . . I was concerned the screen would feel rubbery or grippy, but so far it's very smooth. As with any plastic screen protector there will always be a slight rubber/grip feel and while it is smooth there is that slight grip but not so severe that it's something to be concerned about. I use my thumb to type and navigate the screen with no issues. If you feel this stubbornness, try a lighter touch. The harder you press, the grippier it gets. If you slap the screen with your fingernail, you'll notice it, and your finger will most likely stop moving if you press too hard. If you see a dent in the screen after getting hit by a fingernail, just give it a little time and it will go away if you don't cut the plastic. My fingerprint sensor works fine. I didn't even have to redo my fingerprints. They worked right after installation. I haven't had any issues with blisters or rise in profile around the edges. I've been wearing it for a few days now, in the case, in/out of my back pocket, in/out of the sun and it's still holding up. Each use will be different, so I can only tell you about my experience with this screen protector. If you're wondering whether this screen protector will protect your phone's screen from cracking, I don't think we will. I've seen so many people complain about a cracked screen after dropping their phone face down and then complaining about wasting their money. on the screen protector because her phone screen was cracked. It's like waxing a car and then hitting a wall and expecting no harm. That's not to say that a screen protector absolutely won't protect your phone's screen from cracking, but please don't think that a screen protector makes your phone's screen invincible. It all depends on how your phone hits the ground with ANY screen protector. I personally broke a screen on my S6 Edge with the screen protector and case installed. But the phone landed face down on the concrete with a very small pebble right where the screen had shattered. Every scenario is different. However, this screen protector prevents you from scratching the screen of your expensive phone. Remember that your phone screen is not invincible and SAND will scratch your phone screen. Search online for the hardness of your phone's screen and you'll get a hardness number. Then look at anything harder than your glass screen. So, to put it simply, does any screen protector protect your phone screen from shattering? Probably not. Will some kind of protective film protect you from scratches on the phone screen, most likely yes. For the price, I'll keep them on my screen to at least protect it from scratches and insure it against the occasional screen crack. Hope that helps!
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