Mobile Phone Evolution from the 70's to the 90's

The history of mobile phones dates back to 1908, when a US patent for a cordless phone was obtained in Kentucky. Cellular phones were invented in the 1940s when an AT&T engineer designed cells for cellular base stations. The first cell phones weren&really cell phones. They were wireless devices that allowed people such as taxi drivers and emergency services to communicate with each other. Everything changed on April 3, 1973, when Motorola executive Martin Cooper made the first call using a cell phone. The man he called was a Bell Labs rival. Cooper&phone weighed just under 1.1 kg. The battery lasted him 30 minutes, and after 10 hours of charging he was ready to talk again. These early mobile phones are often referred to as 0G mobile phones or zero generation mobile phones. It will still take him six years before his first 1G cellular network launches, after which it will only launch in central Tokyo. By 1984, the network had grown sufficiently to cover all of Japan. In 1983 Motorola released his DynaTAC 800x. This development cost him $100 million. It cost about $4,000 and allowed him to talk for 30 minutes before he died. It looks like brick and brick is what people call it. Despite the phone&size, it was considered the most portable mobile phone ever made. For the first time in history, humans were able to call someone without the restrictions of cords and cell phone cradles. It wasn&until the 1990s that the developer started releasing second-generation mobile phones. In...