Joke Collection Website - Public benefit messages - How does Unicom check the phone bill by SMS?

How does Unicom check the phone bill by SMS?

Unicom users can try to send the short message "HF" to 100 10 to check the phone bill, and try to send the short message "YE" to100/0 to check the balance. If all the above methods fail, you can also call the hotline 100 10 and follow the voice prompts for self-inquiry.