inventions

The mobile phone is an electronic device that allows to have access to the network of cellular ormobile telephony.tis principal characteristic is the portability, which one allows to communicatefrom almost any place. The principal function is the communication of voice, as the conventionaltelephone. From of the 21st century, the mobile phones has evolved by acquired functionalities that go farbeyond of limiting itself to calling or sending only messages of text, it might say that have beenunified with such different devices as PDA, chamber of photos, organizer, clock alarm clock,calculator, microprojector, GPS or breeding animal an more. The firts person to introduce the mobile phone was Dr MartinCooper in 1973, using a handsetweighing 2 kg.This one is the first cell phone of the history, the grandfather of all that we know atpresent. His name is Motorola DynaTAC 8000X. why he invented, a friend said: "Marty called me to his office one day in December 1972 and said, 'We've got to build a portablecell phone,'" Krolopp recalled. "And I said 'What the hell's a portable cell phone?'" thats the reasonwhy. maria gomez