How to set up incoming SMS reminder after Unicom card is turned off?

Hello, you need to open the service of Unicom secretary to provide missed call reminder function. At present, the policies of different cities and regions are different, and the opening methods of Unicom secretaries are also different. For example, Beijing Unicom can edit the short message "3" locally and send it to 10655 1065438, and open it according to the short message prompts. It is suggested that you can contact local manual customer service for consultation, which is subject to the local Unicom policy.