2.5D refers to a slight curvature at the edge of the glass, which is purely ergonomic and aesthetic, ensures any surfaces that consumers touch and swipe their fingers across are smooth.
With four hours of tempering, the glass is stronger and more scratch-resistant, don't have to worry about the keys and coins in your pockets. Explosion-proof
Safer, even if the glass is broken, it will not get broken glass all over the place.
The oleophobic coating provides a certain amount of finger smudge resistance and It also has a slightly slippery feel to it, which makes the screen feel slick to the touch.