This seems the best thread for my question. How easy is it to get a "pay as you go" SIM for China? My plan is to buy a SIM and then use it on my intermittent visits to the country, maybe 3 per year. I know that I will now have to register the SIM using my passport, but is it possible to load it with, say, RMB 100, and then use it anytime. I would not want a data plan or a limited-time SIM.