Originally Posted by
zyxlsy
Though only China Mobile has operation in HK...
Any foreign SIM cards would have unfiltered internet in China. I am using one right now to have stable connection on my Android device for Gmail pushing to work properly.
It depends on the APN of your phone. If it is not cmnet or 3gnet, you get IPs out of China.
It's like a VPN that is always on. Or like proxy, but un-censored (I've tried proxy servers on IE, and youtube.com still got blocked because the data exchange with proxy service is not encrypted, so the string of youtube.com is seen by the firewall anyway).
Here is the China Unicom HK homepage. Very handy card to have because they have normal 3G, and even though they tell you to set their 3gnet APN you still get unfiltered internet.