People cast more than 125 million cell phones in each year. It becomes a general tendency of the people to shed their phones quite often. For example, it has been found that the Koreans generally change their mobile phones within a year. It is now becoming an environmental issue as well.
According to CTIA, the number of cell phone subscribers in the United States by September 2006 was 219.4 million, up from 25 million in 1994.
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