While buying a screen protector for almost all mobile phones and tablets is a straight forward thing, you will definitely not have a pleasant experience if you are buying a screen protector for the Samsung Galaxy S9 or S8 smartphone. I learnt this the hard way when I bought myself a fairly expensive screen protector from amazon only to find out that it significantly reduced the responsiveness of my Galaxy S8.
The reason is that they both come with curved displays and tempered glass screen protectors simply don’t work with such screens.
So what should you do? You will have to find a plastic screen guard that is not tempered glass.
Another thing to keep in mind is the thickness of the screen guard. Make sure the plastic film is thin as thick screen protectors hinder the sensitivity of the display. Otherwise you will have difficulty typing on the screen of your S8/S9.
The best way to do this is by checking the reviews on amazon and see which one is working. It takes some time but it is totally worth it.
Here are some screen protectors for Galaxy S8 and S9 that I found to be working.
Galaxy S8 screen protectors
IQ Shield LiQuidSkin Full Coverage Screen Protector