What is the main purpose for using a cell phone?

To allow for constant connectivity to an office or home without being tied down to a wired connection. Every time a person takes an out of town trip, or goes to a different office, he or she would have to call family or coworkers, and relay a land line telephone number to a phone where they were at. This is too hampering. With all the advanced features of Cell Phones and PDA's today, wireless connectivity (constant) is even more encompassing with the advent of coast to coast towers for seamless connectivity.