History of phones

In 1946, the first mobile phone has been used by the Swedish police. Innovation related to the telephone network, and it is typical of a two-way radio technology. This phone is not convenient, where he was able to make calls about 6 only until the battery is offshore.

In 1947, ring the Bell Labs created the modern phones innovation was hexagonal cell phone, and then later another visible laboratory cell towers where they receive and transmit signals in 3 directions antenna in 2 directions antenne.En also, even if several technologies have improved, developments Electronics take many years to make it matured and developed to the point.

In 1967, there were already technique of mobile phones, but consumers and users must stay on an area of the cellule.Ces cell areas which are to a base station services are not hand off phone calls in a base for other bases. While one is a call you can no longer continue after reaching a particular range.

A. e. Joel, engineer at Bell Laboratories improved the system of transfer of the year 1967.Transfer system ensures continuity of calls from one location to another without dropped calls.

In 1971, AT & T asked the FCC cellular service while innovation technology has improved .the ' approval took roughly 10 years.FCC initialized 824-894 MHz frequency band in SAP (Advanced Mobile Phone Service).

For decades, on technologies for mobile phones existed on the marché.Ces mobile phones have been installed in the cars due to the strong and large requirement battery.At around in the 1950s, the mobile phone (ATM) system developed by the Erikson but he weighed approximately eighty book, and then later enhanced on a range of 20 pounds and yet it is inefficient for a device of practice that most people use today.

For decades, there were several technologies that existed that available for mobile phones.Most of the time, these phones have been installed in the vehicles because of the large exigences.Par example battery, the MTA (mobile telephone system) developed by Eriksson was available in Sweden years 1950.Malheureusement, it weighs more than 80 books, later versions however weighed around in the range of 20 books, always make them ineffective for truly portable devices that are used today.

The first generation of cell phones made by 1983.Motorola called Motorola DynaTAC cellular, was introduced at the first phones portables.La FCC approved for use in United States it took approximately 15 years on the market with more than one hundred dollars expenditure million.