Be very careful with this step, as misaligning the adhesive can cause it to peek out of the phone during reassembly, leading to an improper seal.

The adhesive is very sticky! Be careful with alignment, as you won't be able to reposition the adhesive once it sticks.

Carefully align the sticky side of the adhesive over the edges of the back cover.

You can use the corners of the back cover to help line up the edges.

Press down on the perimeter of the adhesive strip to bond it to the back cover.