The cell phone were created strictly in the beginning for voice, but today is able to offer another type of services, as data, audio, videos with some limitations and until locations because some of these has GPS (Global Positioning System). One of the interesting aspects of this invention is that the cell phone its an only a very sophisticated radius.
In the time before the cell phones existed, people really needed mobile communication, so before this, people had to use radio-telephones in their cars. The radio-phone system, had only a central antenna for each city, and probably it was available only for 25 channels. For that reason was necessary to created a wider net with more capacity for more users and was in that moment that started thinking in the first cell phone in 1983, the quality of the sound was very bad, it was weighed and not aesthetic. Now the days they are difficult to find the people without a cell phone, because they have done partly of the majority of the population who has one, according to statistics almost 80 per cent of the North Americans have a cell phone since in this modern world it is very important to keep update in the information that affects the world.
On the other hand also this revolutionary invention has also negative aspects the most affected is absent the intimacy. In a review that did in EE. UU most of the people said that this bothered to have to listen to the conversations deprived of other persons. Many persons also think that they do not have to find out about the life of other persons and about his intimacy, then the majority of the people also admitted that his conversations for cellular in public places might be annoying for those who are close. on the other hand, it is uncomfortable to speak a lot of time for cell phone when you are in cinema, in a restaurant, or only walking because it is not respect the persons who are with you.
Another negative point is the distraction that produces to speak for cell phone while somebody drives, or the distraction that causes in the students with the games, or when they received calls that interrupt the classes, for it in many school they have forced to maintain them off while they are in the institutions. But the certain thing is that although it has positive and negatives points is clear that we have to know the importance that it brings to technological development, because is able to shorten distances, and to maintain in contact in cases of emergency.
