Apple is missing the opportunity to reach 2.8 billion wireless customers because of their stringent requirements around minimum purchases of iPhones and price subsidies, according to a report from Bloomberg. In order to carry the iPhone, Apple has strict requirements for carriers. One such requirement relates to minimum purchase agreements, which regional U.S. postpaid carrier Cricket has had some trouble meeting this year. Some smaller carriers, especially those in emerging markets, have difficulties paying the pricey subsidies that Apple's $600 iPhones require. The rumors about a