Hola

I going to expound About cell phones to the classmate well began: The mobile phone is an electronic wireless device to access and use network services or mobile cell phone. Cell is called inmost Latin American countries because the service operates through a network of cells, where each antenna signal repeater is a cell, although there are satellite mobile telephone networks. Its mainfeature is its portability, which allows you to communicate from almost anywhere. The primary function is voice communication, such as the telephone.
From the twenty-first century, mobile phoneshave acquired features that go far beyond simply just call or send text messages, it could be said to be unified (nonreplaced) with various devices such as PDA, camera , electronic calendar, alarm clock,calculator, micro projector, GPS or multimedia player and able to perform multiplications in a small, portable device that has almost everyone in developed countries. This type of evolution of the mobilephone is known as Smartphone.

I going to explain something of the evolution the first cell phone company was Motorola DynaTAC 8000X with its model. The model was designed by engineer Rudy KroloppMotorola in 1983. The model weighed just under a kilo and was worth almost U.S. $ 4000 almost 8 million Colombian pesos; From the DynaTAC 8000X, Motorola would develop new models likethe Motorola MicroTAC, launched in 1989 and the Motorola StarTAC, released market in 1996.

Now I will talk about the functioning of these cell phones

Telephone communication is made possible by the interconnectionbetween mobile stations and public.
According to the bands or frequencies at which the phone operates, may function inone parts or another of the world.
Mobile telephony is a combination of a networkof stations transmitting-receiving stations (repeaters, base stations or BTS) and a series of telephone switching 1st and 5th level (MSC and BSC, respectively), which enables communication...