With my last trip where I used a matrix sim card in China, I am going to recommend using a matrix sim for sure. Firstly, getting a local sim card in china is a mess which I experienced the last time that I went. Language a major issue and then reading those signs another one. So this time I decided to take a local number with me and hence I came across matrix sims. Excellent services in China, messages from the operators were in English which I could read and not that I had to call the customer care for anything, but since they are based in india, raising the concern in English or in Hindi wouldn’t have been a problem at all. So all in all, these sims proved to be really helpful for me on this trip..