Power off the phone. Put your fingernail in the notch on the bottom corner and pry the back cover off. Pull out the SIM card adapters. Screw out 19 Torx screws. Remove rubber seal. Release flashlight sensor flex. Remove rear housing. Remove earpiece speaker. There are adhesive underneath. Set earpiece speaker in place. Put it in the correct side. Make it fit well. Put back rear housing. Tighten up 19 Torx screws. Remember to connect flashlight sensor cable flex well. Put back rubber seal. Put back SIM card adapters in correct side. Put back the back cover. Make it match well to the phone. Done!