Huawei Technologies Co Ltd [HWT.UL] more than doubled its China smartphone revenue in the first half of 2015, defying a slowdown in the world's biggest handset market that is enveloping rivals Xiaomi Inc [XTC.UL] and Samsung Electronics Co Ltd at the high-end of the market, where analysts said an increasing number of previously price-conscious Chinese consumers are willing to spend their money. In contrast to Huawei, overall smartphone shipments in China shrank for the first time in six years in the first quarter, and one-time leader Xiaomi booked its first fall in sequential semi-annual sales, saying the domestic market is nearing saturation.