Step 2: Remove Screws
Use the T6 Torx screwdriver to remove the four screws indicated by the arrows.
Step 3: Pry Housing Apart
Using your fingers, pry the two halves of the phone housing apart. This requires a little persistence and manual dexterity. I found it helpful to start at the bottom near the power/accessory connector and then work my way up prying the rest of the phone apart. If needed, you can gently separate the two halves using the small standard screwdriver.