Asian mobile phone manufacturers helped drive global smartphone sales to a 4.3 per cent year-over-year increase in the second quarter of 2016, despite slowing overall sales, according to data released by Gartner Inc. Thursday. Only half of the top-10 mobile phone vendors increased their sales in the quarter to a total of 344 million units, though overall sales of all mobile phones contracted by 0.5 per cent, the U.K.-based company said in a press release. “Demand for premium smartphones slowed in the second quarter of 2016 as consumers wait for new hardware launches in the second...