How to send text messages to check the flow of Unicom cards?

If it is a 3G package, just send CXLL to 100 10. If you are a 2G user or want to inquire about other traffic packages, different packages have different descriptions. Some packages are unified nationwide, but some can only consult local customer service for explanation. For example, free time traffic, Guangdong users can query the remaining traffic of their free time traffic packages by sending CXSYW to 100 10. As of * * minutes on the 20th * * day, the remaining flow is * *. * * megabytes. But in other places, it is not necessarily this instruction.