Wisdom

Unplug the battery.

Remove the back cover by removing the 6 Pentalobe screws (P6)

The front cover can be taken off by prying it off from the front of the device

Then pry off the back cover it can be a little challenging but take your time

Remove the 6 Philips screws holding the mother board and if you want remove the foil just to see the full board itself

To change out the buttons take out the grey rubber sheet that separates them from the board (be careful with the buttons as they will fall out)