About a century after the telephone was created, Martin Cooper, a developer with the Motorola Company, came up with the first mobile phone, in 1973.
 Born in 1928, Cooper served in the US Navy before taking a degree in Electrical Engineering at Illinois Institute of Technology. His first mobile phone weighed about 1 kilogram or 2.2 pounds. He tested it by calling a rival scientist to announce his success. The Motorola DynaTAC had twenty large buttons, a long rubber antenna and a talk time of just thirty minutes, before needing to be recharged for 10hours.