After nearly six years of negotiations, the iPhone is finally available on China Mobile, which is the largest mobile carrier in the world with around 763 million subscribers. Apple CEO Tim Cook was on hand with China Mobile Chairman Xi Guohua at the carrier's headquarters store in Beijing at launch, according to Bloomberg. Tim Cook with China Mobile's Xi Guohua and a customer. Image via Eunice YoonCook handed out autographed iPhones to the first few customers before he once again praised Apple's new coope