Next month There is a quiz contest in California, under the theme /Cell phone technology/. I am also willing to take part in the same contest, do not have much knowledge about the topic. But still I will work hard and try to win some prize in it, even started preparing for it. here I need your help to clear my confusions on sum topics as- about its history, and how signal flow takes place while communication between two cell phones. please do guide me on the mentioned topics so that I can do better preparation for the quiz.