Apple’s timing on its years-in-the-making deal with China Mobile may turn out to have been prescient: the country’s middle class is expanding rapidly, and with it the ability to enjoy services such as 3G and now LTE smartphone service. According to a new report from Cantor Fitzgerald analyst Brian White, the country grew its 3G-using cellphone subscriber base by 79 percent in 2013, to a total of 417 million users….