Apply a suction cup to the back of the phone, as close to the center of the left edge as possible.

Pull on the suction cup with strong, steady force to create a gap between the back cover and the frame.

Insert the point of an opening pick into the gap.

As the glass on this edge is curved, you won't be able to insert this pick very far. As long as the very tip of the pick is underneath the glass's edge, you will be able to proceed.

Due to tight tolerances, this may take multiple attempts.

If you are having trouble creating a gap, apply more heat to the edge and try again.

You can try also applying a few drops of high concentration (over 90%) isopropyl alcohol into the seam to help loosen the adhesive.

Do not apply excessive force with the pick, or you risk cracking the back cover glass.