Wow. Not only is that huge from an ownership, personal use and network effect standpoint, consider "China's Mobile Revolution", by from the UK's 8 June Sunday Times.
In a January post Emily Turrettini noted ABCnet.au's report on "the ability of the Chinese Government to spy on the country's 500 million mobile phone users." According to ABCnet, "Wang Jianzhou, head of China Mobile, stunned delegates [to the World Economic Forum in Davos] by revealing that the company had unlimited access to the personal data of its [300MM] customers and handed it over to Chinese security officials when demanded. 'We know who you are, but also where you are,' said the CEO."
Thank goodness OUR government and telco operators would never compromise our privacy like that...oh heck.