Looks like Sprint really is prepping a 5-inch Android flagship of its own: the Vital. Thanks to an anonymous source, Engadget's received a motherload of details on the upcoming, white-labeled device, giving us a glimpse at everything from renders to a slickly produced promo video. Based on the information at hand, the ZTE-made Vital should rep an HD display (resolution unspecified) of the 5-inch variety, an unnamed
