"What kind of smartphone should a soldier have? Ahead of the impending expiration of two communications contracts, the Army's 5th Signal Command is prepping for the possibility of buying thousands of mobile devices. An RFI asks for BlackBerrys, 'emerging smartphones included but not limited to 4G devices such as Androids [and] iPhones,' tablet computers, and wireless broadband access devices. Also in the Army mobile vision: an apps marketplace.