If I don't get a call from others, 10086 will send me a message to remind me. What kind of business is this?

Hello, if you are a customer of Beijing Mobile, I can recommend you to handle the "Call Reminder Service". The tariff and introduction are as follows:

Beijing Mobile has launched a call reminder service for customers. When your mobile phone is turned off or out of service, the system will automatically record the incoming call information, and notify you of the incoming call information by SMS after it is turned on. Customers of GSM, M-Zone and Pioneer Card will be charged 3 yuan function fee every month after opening their business. Customers with home cards, listening cards, upgraded standard cards, wireless landline cards and Shenzhouxing 5 yuan cards will be charged a monthly function fee of 1 yuan.

Opening method: edit "KTLD" and send it to 10086, and you can immediately open the call reminder. It will not be accepted after the last day of each month 19.

Please refer to.