Sprint Vital review: a decent mid-range phone that faces tough competition

A year or two ago, mid-range devices were nothing to gush about at neighborhood barbeques. Fast-forward to 2013, however, and smartphones listed at those middling price points are much more desirable. After all, a large number of them would have been considered high-end flagships -- had they launched last summer. The ZTE-made Sprint Vital may well have been one of those phones, given its specs: the handset features a 5-inch 720p display, dual-core Snapdragon S4 chipset, 13MP camera and solid bat...