How to check China Unicom’s free SMS usage for the current month’s package?

If you are a China Unicom user, the SMS instructions for sending text messages to check balance, bill, and traffic are as follows:

1. Write the text message '101' and send it to '10010' to check the current month's phone charges. ;

2. Write text message '102' and send it to '10010' to check the available balance;

3. Write text message '103' and send it to '10010' to check the previous month Bill;

4. Write the text message '104' and send it to '10010' to check the historical bill.

5. Write the text message "CXLL" or "1071" and send it to "10010" to check the remaining traffic.