The number you dialed can't be connected for the time being, and she will be informed of the incoming call by SMS. What do you mean?

The phone you dialed can't be connected for the time being, and the incoming message will be notified to her in the form of SMS, which means that the other party's mobile phone has no signal or is turned off, so it can't be connected now, but the other party has opened the call reminder service, so the mobile will send a SMS to tell the other party when you called her.