If your display is badly cracked, covering it with a layer of clear packing tape may allow the suction cup to adhere. Alternatively, very strong tape may be used instead of the suction cup. If all else fails, you can superglue the suction cup to the broken screen.

Place a suction cup as close to the right edge of the screen as possible.

Lift the suction cup with a strong steady force until a small gap forms between the bezel and midframe.