How does Cambodia receive short messages from China?

According to the information you provided, if you can use Unicom's number to receive domestic short messages and make phone calls in Thailand, it should be that the number has opened international roaming service. You can find out whether you have opened international roaming service by inquiring your roaming level. You can log on to the online business hall/sabmm;

4G primary and secondary cards:/02 UPY;