Don't expect to buy protective glass "for life". You should replace your screen protector at least every six months. Even if you don't break it, it will still get scratched and your smartphone will be uncomfortable to use.

The glass should preferably be less hard than the case glass itself, because the task of the safety glass is to dissipate the impact and convert the kinetic energy of the impact into deformation energy, reducing the impact impulse.

Good afternoon. There is a common misconception that if a new, modern smartphone is equipped with a super-strong screen, it does not need protection. Unfortunately, this is not true: any, even super-strong smartphone screen glass cannot resist scratches, it only depends on the level of stress and the shape and strength of the impact. That's why you should buy Cell Phone Screen Protectors. It will help protect your smartphone screen even if it falls on concrete.