How to cancel the short message of caller ID of telecom mobile phone?

Mobile phone caller ID service is a service to display the caller number for mobile phone users. When a customer applies for caller ID service, if someone calls the customer, the caller number will be displayed on the phone. Edit SMS content 3243 and send it to 1000 1. After cancellation, I can't see who is calling. It is recommended to keep it. For more service benefits, click on "official website" customer service 220 below to answer your questions.