Originally Posted by
moondog
Third, I've found that with Unicom domestic roaming is a trivial expense. With Mobile it's a bit more of an issue, but for Y30/month you can make it a non-issue. Basically, the days of keeping separate SIMs for the cities you spend the most time in are pretty much a thing of the past.
Thanks a lot for the advice, based on your advice, I am thinking its easiest for me to buy a SIM card when I am in Beijing (the city). I understand that I shouldn't worry about roaming charges buying a SIM in Beijing and using in Shanghai. But what about Shanghai locals calling/texting me, is it a problem if I have a Beijing phone number?