What is the automatic reply message of telecom mobile phone after an incoming call?

This should be caused by the surge of on-hook reply messages. You can log in to China Telecom's online business hall for self-service, check the services that have been opened in my package, and then cancel.

"On-hook SMS" means that the mobile phone user dials the customer's fixed phone number, and after the call is over, he will receive a message preset by the enterprise. The content of the message can be enterprise introduction, product introduction, promotion activities, holiday blessing information, etc. , can be modified at any time.