Heat an iOpener and apply it on the display for at least two minutes to soften the adhesive underneath.

Place a suction handle close to the right edge of the display and pull with firm steady force for 30 seconds to loosen the adhesive.

If the phone's screen is cracked, the suction handle may not stick. Try lifting it with strong tape, or superglue the suction handle in place and allow it to cure so you can proceed.