I opened a mobile phone supplementary card. How can I cancel it?

Send four zeros to 10086, and he will inform you of all the services opened by SMS and remind you how to cancel the service. Just cancel according to the above reminder.

You can directly edit the four zeros of the message and send them to 10086, and then send the corresponding business receipt number again according to the receipt number of the message to cancel this business.

You can log in to the online business hall and choose the corresponding business to unsubscribe from the business. You can also log in to the mobile phone business hall, check it after logging in, and unsubscribe from the business that needs to be unsubscribed. Check to complete unsubscribe.

If the above is not enough, you can press 0 manually through 10086. After verifying the service password or real-name ID number, you can inform the customer service of the service you need to unsubscribe from.