Mobile service providers must respond to diverse, sometimes conflicting, market factors, including new technological advancement, rules and regulations, taxes, evolving user needs and demographics, and the emergence of new business models (Harno et al., 2009). As a result, mobile operators have been offering increasingly complex and varied products and cell phone plans. To understand the heterogeneous, rapidly changing mobile telecommunications industry, economists, analysts and mobile operators themselves want to be able to track how prices of products and cell phone plans change over time, but this can be quite difficult to do precisely because of the rapid technological changes (Maresca and Montella, 2000).