Samsung A51 mobile with fingerprint sensor on the screen. I have put on many screen protectors before. Unfortunately, the product is a failure. The fingerprint sensor simply does not work when you put on the case. It is a huge problem. To unlock the phone, I have to press the screen very, very hard and the success rate is 1/3 for it to unlock, and if I don't press, it simply doesn't unlock. Before, the phone would unlock normally every time. I will remove it in the next few days because I am already tired of constantly entering the pin.