Separate the screen from the phone.

Check that all screws are tightened and there are no loose parts.

Reconnect the screen and test your phone to make sure it works. Power it back down and continue reassembly.

Apply new adhesive where it's necessary after cleaning the relevant areas with isopropyl alcohol (>90%).

Follow this guide if you're using custom-cut adhesives for your device.

Follow this guide if you're using a pre-cut adhesive card.