Sorry to say you are wrong here, it is not meant to be removed..... Trust me!
Not to get off subject here, but whenever someone says "trust me", I always start paying close attention, because that person usually has no other response.
What could possibly be the reason for this plastic covering to be kept on? It obviously LOOKS like it should be removed simply because we are so trained as consumers to receive electronics covered in plastic to protect it while it ships. This is also true on new car windshields, large pieces of glass, etc etc.
What kind of design mechanics are involved where a black electronic device with a heavy metal case and a glass face need a flimsy plastic covering on the back of the device that doesn't say "do not remove"? If there were writing on it that said "do not remove", I might side with you here. Maybe.
But please, explain to me why you would say "trust me"? Have you researched this, or spoken to someone who had input in the design of the phone?
I might be taking this too far, in fact I know I am... but for some reason your simplistic response really annoyed me. You will never be able to convince me a cheap plastic covering was meant to be kept on an advanced device like this.
-Wil