used Tech21 screen protectors for years with no issues. I got a new Samsung Galaxy s21 and ordered a £30 screen protector which is the most I've ver paid, but considering the amount of protection over the years I paid it. I applied the new screen protector which assured me that the fingerprint print recognition would work. Unfortunately this was untrue, I have tried reregistering my finger prints and it dosnt even acknowledge them anymore. I emailed to make them aware as I thought they should know and asked if there was maybe a chance I could get help or a replacement as £30 is a lot at Christmas to be wasted, especially for a single parent. They asked for images to be sent which I did as it is still on my phone until the cheaper screen protector from ANOTHER provider I had ordered get delivered. They sent me an email with a YouTube tutorial on how to register my finger print again as if I didn't know how to use my own phone. I've tried this method multiple times but it does not register my fingerprint at all which I've told them. DO NOT PURCHASE SCREEN PROTECTOR FOR SAMSUNG S21. If 1 can be faulty I assume more can also. Dont waste your money go with another supplier. I'm £30 down and issue unresolved