Open the device with a metal or plastic spudger around the edges as indicated.

Note that on the top and bottom of the device, the noses protrude from the display side into the back cover.

On the sides of the device, the noses protrude from the back cover into the display side. (Opposite from the top and bottom of the device)

In order to remove the case, you will have to push the back cover inwards on the top and bottom of the device. On the sides, you will have to pull the the cover out.

Marks made on the plastic can be partially removed by pressing the material back.