We've heard quite a bit about the upcoming ZTE Flash on Sprint over the last couple of weeks, but Best Buy just spilled all the details of the upcoming mid-ranger. According to previous leaks - which have now been confirmed by Best Buy - the Flash has a 4.5-inch 1280x720 display, 1.5GHz dual-core processor, 1GB RAM, and Android 4.0. The handset's claim to fame, however, is its 12.6MP rear shooter - a first for a device in this class on Sprint.

This newcomer to Sprint's 4G LTE network was originally rumored to be available beginning today along with the Optimus G, Mach, and Galaxy Tab 2 10.1 LTE, although BB has it listed as "out of stock" at the moment. Given this, combined with past rumors, we fully expect Sprint to officially announce the Flash tomorrow morning.

Update: The phone is now on Wirefly as well, and is listed as "ships when available."