Place a suction cup near the bottom left corner of the phone. The edge there has slightly thinner adhesive.

Pull on the suction cup with strong, steady force to create a gap in the seam.

Insert an opening pick in the gap.

Depending on how old your phone is, creating this initial gap may be very difficult. Here are some things you can try if you're having trouble:

Repeat the heating and pulling process multiple times to soften the adhesive.

Use a playing card instead of an opening pick to insert in the gap.

Try heating and prying at a different location.

Use a Jimmy to make the initial entry. Be careful working with metal tools, as they will scratch the frame and chip the glass screen.