When two surfaces are polished, the friction coefficient between them decreases | Physics Questions

To begin with you first need to keep one thing in mind, friction is a contact force, and more the contact area more the friction.

Understand this, the normal object surfaces that we see daily are not so smooth as they appear, they have microscopic ridges that get interlocked with the ridges in other objects, and cause the frictional force,

[trident]

Sir does the same principal works for the smartphone screen guard?
Because both the screen guard and screen of phone are smooth and when we put the screen guard on the phone it immediately sticks to it, so can we say it is due to friction?