By Yimou Lee HONG KONG (Reuters) – The likely delayed launch of Apple Incs new iPhone 6 in China, the worlds biggest smartphone market, sparked a race to pre-order the phone in Hong Kong on Friday. Pre-orders for the iPhone 6 and iPhone 6 Plus sold out within two hours on Apples Hong Kong website – and many of those devices will be smuggled across the border into mainland China, where they could change hands for as much as four times the Hong Kong price.