Use the plastic opening tool to pry the top cover away from the phone.
The side buttons on the phone may fall out when the top cover is separated from the phone. They can easily be put back by placing them in their original spot.
Use the tweezers to gently fold the buttons away from the phone.
Be careful not to rip buttons off of the board. You will feel some resistance from the adhesive, but they should easily fold up if they are pulled from the bottom.