Figures from iiMedia Research drive home the challenges facing Apple (NASDAQ:AAPL) as it works to increase its Chinese smartphone share. The firm estimates only 6.1% of the 280M phones sold in China in 2011 had an unsubsidized selling price north of $465, and 58.7% of sales involved phones that sold for $155 or less. The iPhone's average unsubsidized price is around $650. (also)