Mobile History

Radio Microphones has a long and varied history going back to Reginald Fessenden's invention and shore-to-ship demonstration of radio telephony, through the Second World War with military use of radio telephony links and civil services in 1950.The first cell phone to call the car was produced in St. Louis, Missouri, USA, June 17, 1946 using the Bell System mobile phone service, but the system was impractical, which is now considered a mobile phone. Equipment of 80 pounds (36 kg), and AT & T service, basically a massive party line, to pay 30 euros a month (equal to $ 337.33 today), plus 30-40 cents for local calls, which is responsible for $ 3.37 and $ 4.5 today.

In 1956, the first semi automatic car phone, mobile system (MTA), was launched in Sweden. Telephones MTA consisted of vacuum tubes and relays, and the weight is 40 kg. In 1962, a more modern version, called the Mobile System B (MTB) was launched, it was a button on the phone, and the transistors are used to improve the ability to call the phone and improve operational reliability, which reduces the weight unit of 10 kg. In 1971, MTD version was launched, opens a number of different brands of equipment and to achieve commercial success.Martin Cooper, a Motorola researcher and executive is credited with inventing the first practical use of mobile phone is not setting vehicles, after a long race Bell Labs, the first portable cellular phone. Using a modern receiver if a little 'heavy handset, Cooper made the first call on a cell phone in hand April 3, 1973 for his rival, Dr. Joel S. Engel of Bell Labs.

The first commercial automated mobile networks (1G) was launched in Japan by NTT in 1979, first in the Tokyo metropolitan area. Within five years, NTT network was expanded to cover the entire population of Japan and was the first national network 1G. In 1981 this was followed by the simultaneous launch of Nordic Telephone (NMT) mobile system in Denmark, Finland, Norway and Sweden. [9] NMT was the first mobile network offers international roaming. The first 1G network was launched in the U.S. Chicago-based Ameritech in 1983 using Motorola DynaTAC cell phone. Several countries then followed in early 1980, including Britain, Mexico and Canada.The technology first "modern" network on digital 2G (second generation) cellular technology was launched by Radiolinja (now part of Elisa Group) in 1991 in Finland on the GSM standard which also marked the introduction of competition in mobile telecommunications in Radiolinja challenge incumbent Telecom Finland (now part of TeliaSonera) who ran a 1G NMT network.In 2001, the first commercial launch of 3G (Third Generation) was again in Japan by NTT DoCoMo on the WCDMA standard.One of the newest 3G technologies have the High-Speed ​​Downlink Packet Access (HSDPA). He improved the 3G (third generation) mobile telephony communications protocol High-Speed ​​Packet Access (HSPA) family, also coined the 3.5G, 3G + or 3G Turbo, which allows networks based on Universal Mobile Telecommunications System (UMTS ) to have higher data transfer speeds and capacity.