The 3G customers are less than one percent (0.6%) of Unicom's customers.
Because most of Unicom's customers can't afford a 3G phone/contract or don't see the point in spending their limited resources on one.
Therefore they aren't in the market for a $1000 phone.
And it is amazing to snag extremely low double digits of less than 1% of a market?
What's the iPhone (or Windows Mobile/Symbian/whatever) share in other developing countries? Even other countries that are doing well like Chile and Malaysia? Really really low too I'd expect.
China is developing quickly, but they aren't yet as rich as the US/EU/Japan.