In the following steps, you'll be cutting through the adhesive securing the back cover.

The adhesive is laid out as seen in the first image, which shows the inside of the cover after it has been removed.

As seen from outside the phone, you'll be slicing through the adhesive in the areas shown:

Thick portions of adhesive

Thin areas of adhesive

Avoid prying or slicing in this area, to protect the fingerprint sensor flex cable.