Insert a small flathead screwdriver or black plastic spudger between the front silver bezel and the black plastic mid-frame

Gently pry on the bezel to release the clips adhering the screen to the mid-frame

Work your way around the phone, still using the small flathead or spudger, until the screen is fully separated

Remove the screen, taking care not to tear the flex cable that is still threaded through the housing.

After carefully threading the digitizer and outer housing/bezel from the middle bracket you'll notice the digitizer is held on by a band of very strong adhesive - this will be destroyed when you take off the old digitizer. When you replace your digitizer you can use double-sided tape or epoxy to hold the new digitizer on the bezel.