Power off the phone. Remove back cover. Teardown video link in the description. Heat up the phone for a while. Especially for the top & bottom side. Use a spudger to open a gap. Insert a card. Slide the card to cut the adhesive underneath. Slide it between the screen and frame. Do not insert too much. Insert another card. Keep sliding and sepatare the touch display. There is strong adhesive underneath. Be careful and patient. Heat up the brim of the screen. There are some glues along the little brim. Use the plastic opening tools to separate it. The screen is separated. Insert a guitar pick. Slide the guitar pick. Heat up another side. Do the same way to another side. Heat up the bottom side. Slide guitar picks to cut the adhesive of the bottom side. The adhesive is very sticky. Continue cut the adhesive. Mind the navigation button. Pass around the navigation button. Be careful & patient! Then remove the flexes. Remove the plastic cards. Now separate the screen and metal frame. Mind the screen flex here. It’s adhesive. And the fingerprint scanner flex. Something is broken? No.It’s a sponge. Heat up the navigation button. Pry up the navigation button. It’s adhesive. Be careful and patient. Do not scratch it. . Remember to clean out the adhesive before installation. Then heat up the top side. Then remove the speaker metal cover. It’s adhesive. Connect the battery. Old navigation button. Connect the screen. Power on the phone. Unlock the phone. Settings-Security-Fingerprint-Add fingerprint(test the old fingerprint). If you can’t find the fingerprint option,you will need to restart. It works good. Messenger. Test the touch sensitive,especially the edge of the screen. Hold an app and slide it around the display. Everything is fine. And power off. Peel off the middle black adhesive. Don’t throw it. Then Peel off the white protective film. Stick the black adhesive to the metal frame. Make it fit well. Peel off the upper protective film. Put some black adhesive to the new navigation button. Put the speaker metal cover to the new screen. Put some tape to the flex. Make the flex fit well. Lift the flex up. Another side. And the connector side. Install navigation button (from the old screen). Mind the screen flexes. Mind the navigation button flex. Make sure they are through the metal frame. Then make the screen stick to the metal frame. Make them adhesive well. Put some black adhesive to the flexes. Put back speaker. Then the headphone set. Reassemble video link in the description.