Apple CEO is 'incredibly optimistic' about future with China Mobile APPLE chief executive Tim Cook says the tech giant's deal with the world's biggest mobile network will help bolster sales of the iPhone, which already hit a record high in Greater China in the fiscal first quarter. China Mobile chairman Xi Guohua said millions of Apple's iPhones already have been ordered by the carrier's customers, signalling strong demand for the device. Sales of the iPhone through China Mobile, the world's largest carrier by subscribers, are set to begin Friday.