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文件名称:mobile phone
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文件格式:PDF
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.