A cellular phone popularly known as ?cell phone? or ?mobile phone? is an electronic device used for mobile communication. the basic concept of cell phone began in 1947 when researchers looked at crude mobile (car) phones and realized that by using small cells (range of service area) with frequency reuse could increase the traffic capacity of mobile phones substantially, however, the technology to do it was nonexistent.
Apart from performing the standard voice function of a telephone, a cellular phone offers many other services, for example ? SMS, text messaging, instant messaging, built-in cameras and camcorders, internet browsing, infrared, Bluetooth connectivity, games, MMS, TV, video, songs, ringtones, screensavers etc.
Nowadays cellular phones are used for a multitude of different jobs including just plain jibber-jabber, data transfer (I will go into this mode of cellular telephony in-depth later), corporate deals, surveillance, emergencies, and countless other applications.
With the introduction of advanced mobile phone system, the new digital technology has found its way. the top five mobile phone manufacturers available in all countries comprise of about 75%v of all phones old. these are Nokia, Motorola, Samsung, SonyEricsson and LG. apart from these leading manufacturing companies there are other small manufacturers such as Apple Inc., Audiovox (now UT Starcom), Benefon, BenQ-Siemens, High Tech Computer Corporation (HTC), Fujitsu, Kyocera, LG Mobile, Mitsubishi, Motorola, NEC, Neonode, Panasonic (Matsushita Electric), Pantech Curitel, Philips, Research In Motion, Sagem, Samsung, Sanyo, Sharp, Siemens, Sierra Wireless, SK Teletech, Sonim Technologies, Sony Ericsson, T&A Alcatel,Toshiba, and Verizon.
There are two basic elements of the cellular phones i.e frequency reuse and cell splitting.
These two basic elements provide the network an opportunity to handle more simultaneous calls, decrease the transmitters/receivers output/input wattage/gain and a universal signal quality.
Mobile phones work on batteries, which are to be recharged from mains power, a USB port or from a cigarette lighter port in a car. most of the cellular phones have lithium-polymer batteries as these are of very lighter and because of the possibility to make the battery shape other than strict cuboids.
Since the last two decades, the culture of cellular phones has evolved to a great deal. It has grown from a phase of being rare and expensive pieces of equipment used primarily by the business elite to a pervasive low-cost personal item. In most of the countries, cell phones have outnumbered landline phones, with almost people under all age groups using mobile phones. Mobile phones have become a trend and a fashion object.
Source: http://sabermas.net/explore-the-digital-world-with-cellular-phones/
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