The subscriber you dialed has opened SMS service. When can the old man get through?

After the boot. When the other party turns off the phone and can't get through, you will tell the other party to start the SMS service when you call. When he turns on the phone, he will receive your call record. The subscriber you dialed has opened the SMS service, and the old man can't connect until he is turned on. Short message service is the earliest short message service and the most popular short message service.