when trying to open a device first look for any visible screws, then check and see if screws are hidden (under stickers or rubber feet). to check under stickers without removing the sticker just run your finger or a tool over the sticker and see if you find a round dip where a screw will be.
last will be clips under a frame, use a pry tool to lift the edges till you hear the clips pop and release and work your way around. if you dont have a pry tool you can use a butter knife to a small chisel but i recommend something that hard plastic to not scratch or damage anything.
hope this was helpful, good luck and reply back with your results.