Apple has unexpectedly begun selling unlocked iPhone 3G units in Hong Kong, amidst reports that mainland China may end up receiving a functionally handicapped model. Apple’s online store for Hong Kong is now offering both the 8GB and 16GB models of the handset unlocked, priced at HK$ 5,400 (~$695) and HK$ 6,200 (~$798), respectively. A description on the product page reads: “iPhone 3G purchased at the Apple Online Store can be activated…