Mobile phone is a short-range, portable electronic device used for mobile voice or data communication over a network of specialized base stations known as cell sites. It is also known as a cell phone or hand phone(hp). Currently, the world’s largest manufacturer of mobile phones are Nokia. Other major mobile phone manufactures include Samsung, Motorola, Sony Ericsson, and LG. Mobile phones are easy to carry around, useful devices and can use anywhere. Mobile phones becoming very popular because they are cheaper than before. In addition, they are very important and familiar devices in current life for people. As a proof, we can see the total number of mobile phone subscriptions in the world had reached half of the human population, which also makes the mobile phone the most widely spread technology and the most common gadget in the world. Mobile phones may support many additional service and accessories such as SMS, MMS, gaming, bluetooth and other services.
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