UNITED STATES - USDA | Departmental Management (DM) | …

There are over 50 companies with only six top companies in the cell phone industry that controls 80 percent of the market. Even though there are emerging new companies into the market, they are relatively small. The six top companies are rank as follow as the largest to the smallest cell phone company: Verizon Wireless. Cingular Wireless. AT&T ... ................
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