A number of wireless companies made marketing research firm Millward Brown Optimor's annual BrandZ Top 100 list. According to the BrandZ report, "the dollar value of each brand in the ranking is the sum of all future earnings that brand is forecast to generate, discounted to a present day value." The report relies on both customer opinion and financial performance. Some have an international flavor, like O2 and T-Mobile, though the rankings of U.S. wireless carrier giants Verizon Wireless and AT&T Mobility may come as a surprise. And finding the top brand on the list may require an Internet search of some sort (hint hint). Slideshow