Originally Posted by
jamar
Do be aware, though, that some SIM cards charge more for usage outside the "home" area (i.e. the city/province it was purchased in). If you're traveling a lot go into a carrier shop (either China Mobile or China Unicom) and ask for a SIM with discounted roaming (in China the concept of "domestic roaming" still exists) or a nation-wide rate package.
I don't know of any pre paid SIMs that don't penalize for roaming in some fashion, but even roaming rates tend to be fairly reasonable, and text is always cheap.