China Mobile, the world's biggest mobile carrier, has announced that it is preparing to introduce a new brand for its mobile service on December 18, potentially signaling the launch of its 4G network and sales of the iPhone on the carrier, reports The Wall Street Journal. The launch is expected during the company’s 4G global partners conference in Guangzhou, according to China Mobile’s website. An executive at the world’s largest mobile operator has said it is ready to start fourth-generation mobile services, though China has yet to issue 4G licenses. Last month, an alleged China Mobile