Super easy replacement, doesn’t take long and fairly low risk. Flip the phone face down on a padded surface, heat up the lens, wearing safety glasses take a thin tool (I use a razor blade or fine tipped tweezers depending on the damage) remove the old lens, clean the old adhesive off completely. carefully clean the shooter then blow it off with canned air to remove dust and debris. Install new adhesive, install new lens wearing gloves. Done