China Unicom, the sole carrier for the iPhone out east, has been putting on a good face about their underwhelming sales, but a source has just let slip that 300,000 units have been sold to date. Before you get too excited, keep in mind that according to their technology division, iPhone currently constitutes 4% of China Unicom’s handset acquisitions, while Windows Mobile commands 8% and Symbian 16%. The lack of Wi-Fi certainly stunts potential for the iPhone in China, especially when thusly-enabled handsets are available in Hong Kong. Wi-Fi aside, capacitive touch isn’t a great option for character recognition either – maybe the iPhone is just permanently doomed to slow (if steady) progress in China.