You are properly wondering that why I should use a screen protector my display is strong enough. No, it is not the case; iPhone is strong but not strong enough to withstand heavy falls. These screen protectors not only protects the screen but also the buttons and sensors from damage. Many people still believe that it is not useful to have a screen protector but it is very important in protecting your phone.
Often you keep your phone in pocket or bag which makes it highly prone to getting damaged. Also, you keep coins and other stuff in the same bag which can cause scratches on your screen. Sometimes it can fall from your pocket or bag and get highly damaged, so in these situations, the screen protectors can save your phone. If your screen got damaged even with the screen protectors then bring it to Apple iPhone Service Center in Chennai.