Today all PCCW Home Netvigator (one of the largest Broadband ISP in Hong Kong) customer encountered problems accessing web sites outside of Hong Kong. It started for me some time around 14:00 and is still an issue. Fortunately, many people who has an iPhone was able to tether their computer to their iPhone's HSDPA connection.
This produce a very good result. Although, as the PCCW problem persist throughout the evening. I presume more and more HSDPA customers are tethering their phone to their computer for Internet connection.
I notice Smartone-Vodafone; who previously did not make a distinction between regular HSPDA traffic and tethered traffic. This evening all of a sudden modified their settings so that their "SmartoneIN Toolbar" momentary appeared in the Safari browser window on the Mac, while the Mac is tethered to the iPhone.
This means that Smartone-Vodafone may have changed their exchange settings in an attempt to identify tethered traffic and/or control the bandwidth usage on their network.
For anyone who is not paying for a Smartone-Vodafone Tethering package, I suggest you stop tethering your computer to your iPhone until we who had used this service this month check our upcoming bills for charges from Smartone-Vodafone.