To remove the plastic cover. You want to use the plastic opener and starting with corners.

Then insert the metal spudger in the opening and slowly move the metal spudger along all sides of the cover.

Caution: Metal spudger can damage the internal components of the device such as the motherboard. Make sure to use it carefully in order to avoid any unnecessary damages.

Make sure the metal supdger is inserted deep enough as the cover is glued to the device.

Carefully remove the cover as it can be very fragile