Pull up on the suction cup with firm, constant pressure and insert an opening pick between the front panel and rear case.

Do not insert the pick deeper than 1.5 mm, or you risk damaging the OLED panel.

This requires a significant amount of force and patience. If you have trouble, rock the suction cup and screen to weaken the adhesive, or apply heat with an iOpener, heat gun, or hair dryer.

The display panel is fragile. If you plan to re-use your display, take care to insert your tool only as far as necessary to separate the adhesive. Inserting the tool any further can damage the OLED panel under the glass.