Tecnico

THE CELL PHONE
The cell phone or mobile phone is the mobile phone is a wireless electronic device that allows access to the cellular network or mobile. Cell is called in most Latin Americancountries because the service operates through a network of cells, where each repeater antennas is a cell signal, but there are also satellite mobile telephone networks. Its main feature is its portability,which lets you communicate from almost anywhere. The primary function is voice communication, such as the telephone.
In addition to telephony, modern mobile phones also support a wide variety ofother services such as text messaging, MMS, e-mail, Internet access, short-range wireless communications (infrared, Bluetooth), business applications, gaming and photography. Mobile phones that offerthese more general computing capabilities are referred to as smart phones.
The first mobile telephone call made from a car occurred in St. Louis, Missouri, USA on June 17, 1946, using the Bell System'sMobile Telephone Service, but the system was impractical from what is considered a portable handset today. The equipment weighed 80 pounds (36 kg), and the AT&T service, basically a massive partyline, cost $30 USD per month (equal to $337.33 today) plus $.30 to $.40 per local call, equal to $3.37 to $4.5 today.

HISTORY
Radiophones have a long and varied history going back to ReginaldFessenden'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 the 1950s.
Martin Cooper, aMotorola researcher and executive is considered to be the inventor of the first practical mobile phone for handheld use in a non-vehicle setting, after a long race against Bell Labs for the first portablemobile phone.
Using a modern, if somewhat heavy portable handset, Cooper made the first call on a handheld mobile phone on April 3, 1973 to his rival, Dr. Joel S. Engel of Bell Labs.

The first...