Wireless phones work by sending and receiving signals over radio waves.
With analog phones, the first generation of mobile phones, calls are kept separate by traveling on different radio wave frequencies. Since the number of frequencies available for wireless calls is limited, analog networks are limited in their ability to handle today's rapidly growing demands for wireless communication. Digital phone technology was introduced to allow each radio frequency to handle more than one call at a time. It also offers sound quality advantages. Since digital technology allows a radio wave to carry much simpler information than its predecessor, analog, more than one digital call can travel over a single frequency at the same time.