The document outlines the history of mobile marketing, beginning with the introduction of the telephone in 1876 and culminating in the projection of mobile marketing generating $400 billion in sales by 2015. It highlights significant milestones such as the first text message in 1992, the rise of SMS campaigns in 2005, and the expansion of mobile marketing into a $14 billion industry by 2011. Additionally, it notes the anticipated takeover of mobile internet usage over desktop by 2014 and the increasing prevalence of connected devices by 2020.