文件名称：mobile phone
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更新时间：2012-04-25 09:06:09
mobile phone
Mobile phones are virtually omnipresent. In 2008, 3.3 billion people—half the world population—use mobile phones, according to the International Telecommunications Union. By 2010, Nokia expects that there will be as many mobile phone users as toothbrush users (4 billion). Over the past 10 years, the phone has expanded from being just a phone to being a full multimedia unit, on which you can play games (see Figure 1), shoot photos, listen to music, watch television or video, send messages, and do videoconferencing.