However, many VPNs don’t work well in China and can be agonizingly slow.
They offer Dual HK/China China Unicom SIM cards that, because they offer Hong Kong data roaming, don’t require a VPN to circumvent the internet censorship while in China.
The only downside is that data rates are much higher this way (compared to buying a China only SIM), but at least you won’t need to purchase a VPN for your phone (computer users will still need a VPN! Another company that can ship you a China SIM card to your home before you leave, or to your hotel when you arrive, is Loyo Mobile.
Just make sure that your phone is already unlocked, and you will have no trouble using a new SIM.
China mobile networks operates much in the same way, however there are a few wrinkles that you should be aware of — so here is a guide to help you figure out which SIM card to get when you come to China. Network: The 2nd largest mobile carrier in China, and is the only carrier that has 3G that will work with phones from outside China.
I like to be flexible so I tend to stay away from contracts. A VPN will be necessary when you are travelling or living in China since most everything (gmail, google, youtube, facebook, instagram) is blocked in the Mainland (Hong Kong is unblocked).