Heat up the edge. Focus on the bottom. Use plastic or poker card to open the Back Cover. Remove the screw here. Remove the bracket. Release the Front Camera flex cable. Take off the rubber from the worn one and put it on the new one. Take off the conducting fabric and put it on the new one. Connect the flex cable. Put back bracket. Tighten up the screw. Put on the Back Cover Sticker. Make the sticker adhere to the Back Cover. Remove the protective film. Put Back the Back Cover. Make it match well to the phone.