Don't Get a Screen Protector Until You See This
2,801A phone's touchscreen works by detecting the presence and location of a touch event, such as a finger press or swipe, on the display. To do this, the display is equipped with a layer called a "touchscreen digitizer."
The touchscreen digitizer consists of a transparent layer of conductive material, such as indium tin oxide (ITO), that is placed on top of the display. When a finger touches the screen, it presses down on the top layer of the digitizer, causing a change in the electrical current running through the conductive layer. This change in current is then detected by sensors in the display, which send a signal to the phone's processor to register the touch event and determine its location on the screen.
Screen protectors can sometimes interfere with the touchscreen's ability to detect touch events because they add an additional layer between the finger and the touchscreen digitizer. This extra layer can disrupt the transmission of the electrical current that is used to detect touch events, leading to reduced sensitivity or missed touch events. In some cases, screen protectors can also cause the screen to feel less responsive or "laggy," as it takes longer for the phone to register and respond to touch input.
It's worth noting that not all screen protectors will negatively impact the touchscreen's performance. Some screen protectors are specifically designed to be thin and highly transparent, in order to minimize interference with the touchscreen's sensitivity. However, even with these types of screen protectors, there may still be some slight reduction in touchscreen performance compared to using the phone without a screen protector.