Heat an iOpener and apply it to the left edge of the phone for at least 90 seconds.
A hair dryer, heat gun, or hot plate may also be used, but be careful not to overheat the phone—the OLED display and internal battery are both susceptible to heat damage.
As you're waiting for the adhesive to soften, move on and read the following step to get an idea of where to pry.
Carefully slide the tip of the opening pick down and up the side of the phone, making sure not to cut deeper than 1/16" (1.5 mm).
As you run the pick along the side, you will feel the tip of the pick press against the edge of the OLED panel. That is as far as the pick should go without damaging the panel.
Once you have separated the adhesive, leave an opening pick in the side to keep the adhesive from resealing.
Compare your new replacement part to the original part. You may need to transfer remaining components (such as the flash lens) or remove adhesive backings from the new part before installing.
Before you reinstall the display assembly, thoroughly remove any remaining adhesive and glass from the frame.
After removing all traces of glue and glass from the frame, clean the adhesion areas with 90% (or higher) isopropyl alcohol and a lint-free cloth or coffee filter.
Be sure to turn on your phone and test your repair before installing new adhesive and resealing the phone.