Mobile telephony is one of the fastest growing technologies in the world today. Information and communication technology, otherwise known as ICT, has become the leading and most rapidly expanding service sector, surpassing the economic power of other industries such as health, education, and housing to become the leading household expenditure between 1995 and 2005 (Katz 2008). By January of 2006, there were 2.17 billion cell phones on the planet, more than one phone for every third person. The 2009 ICT Development Index states, "In the developing world, mobile phones have revolutionized telecommunication and have reached an estimated average 49.5 per cent penetration rate at the end of 2008 - from close to zero only ten years ago" (Dunn 2009).