Ok,
I have to disagree with this assessment of the situation.
500.000, maybe. 5 million, no.
All statistics point to the facts that Chinese rarely take up consumer credits, that they tend to save money rather than spending it and that the average price for a cell phone in China is very, very low.
Chinese consumers spend a disproportionate amount of their incomes on mobile phones. Here are the reasons why:
1) service costs are low but phones tend to be unsubsidized
2) there is a large market for second hand phones on Taobao (China equivalent of ebay) so it is possible to sell a phone for reasonable value after 6 months of owning it
3)Phones ARE a major status symbol for a lot of people because most can't afford to buy a house or a car. The next most visible item is a phone. They have it with them every day so they can use it to make a statement
4)The statement that Chinese rarely take up consumer credit is not true. Traditionally Chinese are known as having a high savings rate, but younger consumers are not following this trend. Use of credit has taken off in a major way in the last two years and this is impacting the way people spend
5)Younger consumers, including a lot of white collar workers in their 20s, still live at home with their parents. In many cases they do not pay rent, and pay very little for food. This means that the income they do have can go towards purchasing items like iphones
6)Walking into any electronics market in a major city in China you can find handsets from Nokia, HTC, LG, Rim, and yes gray market iPhones for 4000+ RMB so the pricing isn't going to deter people looking at the phone as a status symbol
7)China just conceded to the WTO on regulations regarding the sale of media into China which is going to make it easier for concepts like the app store to work here
5 million, doable, definitely. China Unicom is like China Mobile's redheaded stepsister, but still has an awful lot of subscribers.