How to check the phone bill by SMS?

Telecom users can edit the short message code 10 1 and send it to 1000 1 to check the phone bill. They can also download and install the Huan go client on their mobile phones, and then log in to their telecom mobile phone numbers to check the phone charges. They can also call the telecom self-service hotline 1000 1 directly, and then press the corresponding number keys according to the voice guidance.