Bought two 6p's and 1 has loose/loud buttons, the other has solid/quieter buttons. I feel it has to do with the tolerances of the metal around/behind the button. If you graze or lightly tap repeatedly, you hear audible click, especially with volume rocker, almost as if it rattles. Probably not quite bad enough to warrant a replacement, just a little annoying knowing the button is just slightly off every time I pick up phone. Curious if anyone else is experiencing this?