Use this guide to install a rear case.
Slide the battery cover downwards with pressure focused on the center of the cover.
Lift the cover off of the phone.
Grasp the bottom left and right corners of the battery and lift it from its housing.
Remove the four black 7.30 mm screws surrounding the battery housing using a Phillips #00 Screwdriver.
Insert the Plastic Opening Tool in between the front and rear cases.
Pry with the Plastic Opening Tool around all edges of the phone until you free all the clips.
Lift the rear case off of the phone.