Before you begin, figure out how the pre-cut adhesive strip should be oriented and which surface to attach it to.

If your pre-cut adhesive has pull tabs facing the center hole, the adhesive will attach to the phone's battery well first.

If your pre-cut adhesive strip has pull tabs on the outer perimeter, the adhesive will attach to the battery first.

Peel the clear plastic liner off of the pre-cut adhesive strip, exposing the adhesive.

Line up a long edge of the adhesive with the proper surface, as determined above.

Carefully set the adhesive down on the surface.

The adhesive is very sticky, so you have only one chance to align it.