Introduction The world's first mobile phone, the DynaTAC 8000x, was invented by Martin Cooper, a Motorola engineer, in 1973. It was a bulky device that weighed over 2 pounds and had a talk time of only 30 minutes, but it was a revolutionary product that changed the way people communicated. How the DynaTAC 8000x Worked The DynaTAC 8000x worked by using analog cellular technology. Analog cellular networks divide a geographic area into small cells, each of which has its own base station. When a mobile phone user makes a call, the phone connects to the nearest base station. As the user moves, the phone automatically switches to the base station with the strongest signal. Features of the DynaTAC 8000x The DynaTAC 8000x was a very basic device by today's standards. It had a small LED display that could show the time and date, and it had a keypad that could be used to dial numbers. The phone also had a microphone and a speaker. Development of the DynaTAC 8000x Cooper began working o