Mobile technology has gone through three distinct periods-during which a single cost element has been the largest part of the price that enterprises pay for in mobile. For many years, the primary way businesses used mobile devices was voice communication. In the next wave, email & electronic messaging led. Executives found a significant business advantage in being able to be in touch when they were out of the office. As smartphones become the standard for businesses, data has increasingly become the primary cost driver. Read on to see what is coming in 2014.