If you are using a vivo mobile phone, the status bar does not display the operator, which is to keep the status bar simple, and there is no operator logo in the status bar. You can pull down the call notification bar/control center from the upper right corner to check the operator to which the SIM card belongs.

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

Method 1: Go to "Phone"-upper right corner-phone settings-identify strange numbers online, pop up the pop-up window for protocol change and click "Agree". Then observe whether the details of incoming and outgoing call records show operator information (if the protocol change popup window does not pop up, please refer to Method 2)

Method 2: Enter Telephone-upper right corner-phone settings-identify strange numbers online, but the protocol change popup window does not pop up, and the online identification of strange numbers switch is on. Please check whether the "improve the accuracy of number identification" switch is off, and if it is off, turn on "improve".

second, after the above two methods are used, the pop-up information of the agreement change still does not pop up, 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.