If your phone has a cracked screen or glass back cover, keep further breakage contained and prevent bodily harm during your repair by taping over the glass.

Lay overlapping strips of packing tape over the glass until the whole surface is covered.

This will keep glass shards contained and provide structural integrity when prying and lifting the glass.

Wear safety glasses to protect your eyes from any glass shaken free during the repair.

If the broken glass makes it difficult to get a suction cup to stick to the surface, try folding a strong piece of tape (such as duct tape) into a handle to lift the glass.