How Mobile Phones Work

A basic type of mobile phone has a small speaker, an antenna, a small microphone, a radio transmitter, a portable microchip or SIM (Subscriber Identity Module) card, a hard drive, and a lithium ion battery. All of these things are encased within a frame or shell made from plastic, or sometimes other materials, with an appealing or ergonomic form. These different elements are what constitute a mobile phone. The phones can communicate using radio waves. In order for the phones to work, they must be in communication or connected with a cell site, which is the reason why these devices are also known as cell or cellular phones. These cell sites are basically large radio antennas that are placed on top of buildings or at the highest points within a given area.

A typical cell site can provide about an 8-mile radius of coverage for the phones. With the use of radio waves, the phones communicate with the cell sites and these communications are then transmitted from the site to a wired network. Since mobile phones can only work within the radius of available cellular coverage, users have to stay within 8 miles of a cell site. However, with the widespread popularity of cell phones these days, it is not very hard to keep in touch with one’s family and friends through a mobile. Furthermore, modern cell phones now boast of having all sorts of additional features which make them multi-functional devices. Some of the most common extra features are digital cameras, media players, and Internet connectivity.