BEIJING (Reuters) -Sales of foreign-branded phones, including Apple Inc's iPhone, declined 31.3% year-on-year in China in June, according to Reuters' calculations based on data released on Wednesday by a government-affiliated research firm.

The shipments of foreign-branded phones had slid to 1.971 million units in June, from 2.869 million handsets the same month a year earlier, calculations based on the data from the China Academy of Information and Communications Technology (CAICT) showed.

Overall phone sales in China fell 9.3% to 22.598 million units in June, according to the data.