Take the metal spudger and insert it into the seam of the rear cover casing and gently pry upwards.

If done correctly, you should feel the clips release.

Ensure that all the clips are released by sliding the spudger along the four edges of the tablet.

Do not force the clips to release. This will cause them to break, and if broken, the screen will become loose. Open the rear cover gently and with caution.