Phones are necesary for each of us because we need to keep contacting family or friends. Phones technology advanced so much. When phones appeared for the first time, they had signal just in some places.
In an emergency, a phone can save lifes. That's why a mobil phone isn't a simple device. In addition, some of them come equipped with GPS, this thing allow very precise location.
The importance of mobile phones surpasses the ability to make and receive calls, and get up the possibility to make transfers between computers and laptops. One of the many good things that technology has brought in present are mobile phones.