Mobile+phone

The mobile phone is an electronic device that allows to have access to the network of cellular or mobile telephony. tis principal characteristic is the portability, which one allows to communicate from almost any place. The principal function is the communication of voice, as the conventional telephone. The firts person to introduce the mobile phone was Dr MartinCooper in 1973, using a handset weighing 2 kg. This one is the first cell phone of the history, the grandfather of all that we know at present. His name is Motorola DynaTAC 8000X.

From of the 21st century, the mobile phones has evolved by acquired functionalities that go far beyond of limiting itself to calling or sending only messages of text, it might say that have been unified with such different devices as PDA, chamber of photos, organizer, clock alarm clock, calculator, microprojector, GPS or breeding animal an more. All mobile phones have a number of features in common, but manufacturers also try to differentiate their own products by implementing additional functions to make them more attractive to consumers. This has led to great innovation in mobile phone development over the past 20 years. The common components found on all phones are:
 * A battery, typically rechargeable, providing the power source for the phone functions
 * An input mechanism to allow the user to interact with the phone. The most common input mechanism is a keypad, but touch screens are also found in some high-end smartphones.
 * Basic mobile phone services to allow users to make calls and send text messages.

> > "Marty called me to his office one day in December 1972 and said, 'We've got to build a portable cell phone,'" Krolopp recalled. "And I said 'What the hell's a portable cell phone?'" thats the reason why. Tatiana Borrero.
 * Why did Martin cooper invent it, a friend said: