Power off the phone. Take out SIM card tray. Undo two small T2 screws. You need two plastic opening tools. Slide the tool to open a gap. Be careful not to scratch the metal rear cover. Then insert another tool. Keep sliding. Then you can see a gap here. Be careful not to scratch the metal rear cover. Then pry up the rear cover on the bottom of the phone. Keep prying up. Similar to iPhone here. Slide the plastic tool to separate the side of the rear housing. Mind the power button. Take you efforts. The same on the other side. Need some time to remove it. There is no adhesive. After slide along the rear housing cover. You can separate the rear housing and the front screen assembly now. Undo 8 Phillips screws. There are 3 small and 5 big screws. Remove the metal bracket. Remove the wire cable Motherboard cable flex connector. Charging port flex connector. Battery connector. Release screen flex connector. Pry out the motherboard. Remove ear speaker. There are no adhesive here! Put ear receiver in place. Make it fit well. Mind the metal contactors here. Put back motherboard. Pressed down the motherboard into the frame. Reconnect the screen cable flex connector and battery connector. Another 2 extension cable flex connectors. Wire cable connector. Power on the phone. Make a phone call. Power off. Put back metal bracket. Fasten 8 Phillips screws. Put the screen assembly back to the rear cover panel Put the top side in first Pinch down two sides. Don’t put too much pressure on it in case you broken the screen. Mind the button. Pinch down the bottom. Check whether the screen works well by power on the phone. Check the ring silent switch and the volume buttons. It works well. And the power button. Fasten two T2 screws at the bottom in place. Put back SIM card tray.