Sprint's service is inhibited by physical barriers like buildings, and there were (possibly apocryphal or entirely nonsanguine) complaints about aluminum bodied iPhones having signal issues with Sprint. Will this be a problem for Sprint users? I know there is a plastic band on the phone to allow signal pass-through, but will it be adequate? I see there will be a review of the Sprint device will be posted soon, but does anyone know what effect if any we should expect from an aluminum case?