Like Singapore, it is illegal to lock phones in HK. We have always bought iPhones in Hong Kong for this reason. There are dozens of us and every one of us have become dependant on these devices. iPhones rock!
I agree, it does make zero sense, but I have seen the email from apple tech support recommending buying a separate handset for Canada. This was after a series of exchanges regarding the serial numbers of the phone and Apple tech confirmed it was an unlocked model.
I am just looking for anyone who switches SIM cards between these regions.
I would contact his carrier to find out details.
You shouldnt have to buy a new iphone 5 on every country that you visit.
It might be a mistake on his account cause obviously his iphone is not unlocked for some reason.