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How does China Unicom inquire about telephone charges, traffic and call duration through SMS?

Due to the different policies of China Unicom in different cities, SMS has different ways to query telephone charges and traffic. You can try sending "CXYE" to 100 10 to check the phone bill and "CXLL" to 100 10 to check the traffic. Specifically, you can also consult the customer service of Unicom in the place of origin, and the Unicom policy in the place of origin shall prevail.