Huawei Technologies Co.’s revenue grew for the seventh straight quarter after its smartphones enjoyed sustained demand in China at Apple Inc.’s expense.The Shenzhen-based telecommunications giant posted sales of 168.4 billion yuan ($23.7 billion) in the September quarter, up 15.6% from a year earlier, according to calculations based on its parent’s nine-month financial figures posted on the Shanghai Clearing House’s website. The filing did not offer a breakdown on contributions from different bu...