Adhesive secures the perimeter of the back glass to the frame.

When separating the adhesive, don't insert your tool more than 3 mm under the back glass to avoid damaging the internal components.

To help, measure and mark 3 mm from the tip of an opening pick with a permanent marker.

If your screen or back glass is badly cracked, a suction cup may not perfectly adhere.

Lay overlapping strips of packing tape over the glass to protect yourself and make disassembly easier. Ensure there's a smooth area near the bottom edge that's large and smooth enough for a suction cup to stick to.