How to inquire the telephone number of telecom card?

Telecom users can check the phone bill by editing the short message code 10 1 and sending it to 100 1. They can also download and install the Huan go client on their mobile phones, and then log in to their own telecom mobile phone numbers. They can also call the telecom self-service hotline 100 1 directly, and then press the corresponding number keys according to the voice guidance.