Xiaomi growth slows in Q3 as China smartphone demand wanes

SHANGHAI (Reuters) - Chinese smartphone maker Xiaomi Corp posted its slowest-ever quarterly revenue growth as the country's smartphone market grapples with a protracted lull in sales and larger rival Huawei increases its share of the market.Demand for smartphones has eased in China as consumers hold on to devices for longer. Shoppers have also rallied behind Huawei, boosting sales at the world's second-largest smartphone maker, which the United States has added to a trade blacklist.Smartphone..