If the status bar does not show the operator, this is to keep the status bar concise, and there is no operator sign in the status bar. You can drop down the call notification bar/control center from the upper right corner to see the operator to which the SIM card belongs.

If it refers to the phenomenon that the incoming call, outgoing call and call records do not show the operator, please observe and use it according to the following methods:

Method 1: Go to "Phone"-upper right corner-phone settings-identify strange numbers online, and click "Agree" to pop up the pop-up window for protocol change, and then observe whether the details of incoming and outgoing calls are displayed (if there is no pop-up window for protocol change, please refer to Method 2).

Method 2: Go to "Phone"-upper right corner-phone settings-identify strange numbers online. There is no pop-up window for protocol change, and the switch for online identification of strange numbers is turned on. Please check whether the "Improve the Accuracy of Number Recognition" switch is turned off. If it is off, turn on the "improve the accuracy of number recognition" switch, and a window will pop up to prompt the new protocol. After agreeing to the agreement, check whether the details of incoming and outgoing calls are displayed.

2. If the pop-up information cannot be changed by using the protocol after the above two methods, and the other operator cannot be displayed, you can enter vivo official website-click My-online customer service, and enter "Manual" to contact online customer service for processing.