Selecting the latest smartphone with all the bells and whistles might prove successful for your business, but a smartphone is only as good as its network. Instead of relying on the carrier's coverage map, use an independent source that gathers data on U.S. cell coverage for all major carriers. Signing a two-year could save a couple hundred bucks on the phone, but you could end up paying more over the two years. Evaluate the features that come with a plan and decide if a month-to-month contract—if offered by the carrier—would be more economical. Choose a phone that feels good in your hand, is easy to learn or use, and will keep pace as apps and networks evolve.