The subscriber you dialed has opened the call reminder service of China Mobile, and we will inform you by SMS. Why is this?

Because the other party's phone signal is not good, it can't be connected for the time being or has been turned off, and then the other party has opened the call reminder service, and there will be such a prompt when calling the other party.

Call reminder service is a missed call reminder service. Its main function is: after the customer orders this service, when the customer turns off the phone, in the state of no signal and no incoming call, it will play a prompt tone to the caller, such as "China Mobile's incoming call reminder reminds you that the customer has opened the incoming call reminder service, please feel free to hang up" (no charge), and the called customer who orders this service will receive an incoming call SMS reminder.

When customers use call waiting and call forwarding, the call reminder service does not work.

The reminder received by the called customer who subscribes to the service includes all the operator numbers.