[marcus_cruz]

I think it has to do with surface tension. Imagina a piece of plexiglass or clear plastic. if you bend it it will bend easier in the middle. The areas towards the edges will be extremely difficult to bend because they're anchored to the device. This is what may be going on here on our devices, diamonds and TP's. I think htc should have made the plastic cover more flexible near the edges for tension to be register through that layer to the actual item that does the registering.