The called user rings several times to indicate that the communication assistant service has been used.

1. Generally, this situation is because the other user has opened the communication assistant service, such as call secretary, message missing reminder and other related services; So when the called number is turned off and there is no signal coverage, the system will automatically broadcast such reminders.

2. Take China Unicom as an example. If the missed message reminder service is enabled, when the registered user is turned off or out of service area, the system will automatically broadcast to the calling party: "Hello, the subscriber you dialed has entered the artificial secretary service. If you need to listen to this user's message or leave a message for this user, it will be charged according to your basic call fee. Please press 1 to confirm. Press 1 to enter the manual radio station and leave a message for the owner. Press the 2 key or hang up, and the system will send the incoming call or message information to the called user by SMS. "

Thirdly, taking Chongqing Unicom as an example, users can edit the short message "MSDZ" and send it to106551kloc-0/98, so as to turn on the missing message reminder. After the setting is enabled, when the mobile phone can't answer the incoming call due to reasons such as power off and no network coverage, the system will send the missed call information to the user via SMS, reminding the user that the missed call only costs 3 yuan money every month.

Tips: As the policies in different regions may be different, you can call the local Unicom customer service hotline for consultation.