Apply a suction cup to the rear glass, as close to the right edge as possible.

If the phone's rear glass 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.

Pull up on the suction up with strong, steady force to create a gap.

Depending on the age of your device, this may be difficult. If you have trouble, apply more heat to further soften the adhesive and try again.

Insert the tip of an opening pick into the gap between the rear glass and frame.