How to query the balance of China Unicom's telephone charges?

Unicom's method for checking the phone bill balance is as follows:

China Unicom APP: Log in to China Unicom APP, and you can see your "remaining phone bill" on the homepage. Click to enter to view the phone bill details.

Description of SMS: Send the message "HF" to 100 10 to check the phone bill of the current month. Send the short message "HFMX" to 100 10 to view the real-time phone bill details.

China Unicom Network Room: Open the login 100 10.com on the computer and click the "Query" menu to check the phone bill.

China Unicom micro-hall: WeChat official account "China Unicom micro-hall", click the "Service" menu, and then "Binding number" and "self-inquiry" to check the phone bill.