Sales of foreign-branded mobile phones in China, including those from Apple Inc. (AAPL), dropped by 31.3% in June compared to the same period last year, according to a Reuters report based on data from the China Academy of Information and Communications Technology (CAICT). The decline saw shipments fall to 1.971 million units from 2.869 million a year earlier, reflecting a significant contraction for international brands in the competitive market.