1. Go to the business hall with your ID card.
2. Inquire through the mobile phone business hall APP or through the mobile phone business hall self-service machine.
3. Send the short message "real name" or "507" to 1000 1 for inquiry.
4. Inquire through China Telecom's toll-free customer service telephone number 10000.
I hope the above methods can help you. If you still can't find it, please check in the nearby business hall.