Just a couple days before the iPhone launches on China Mobile, the world's largest carrier, Apple CEO Tim Cook sat down with the Wall Street Journal to discuss how "incredibly optimistic" he is about Apple's new cooperation with the carrier. "We've gotten to know each other.today is a beginning, and I think there are lots more things our companies can do together in the future," Mr. Cook said.The immediate future, according to China Mobile Chairman Xi Guohua, includes "multi-millions" of iPhones already ordered by the carrier's customers. Earlier today, it was reported that Apple's iPhone 5s supplier Foxconn had shipped roughly 1.4 million iPhone 5s units in advance of the phones' launch in