Where is the volte switch of the telecom card holder?

It means that the phone has turned on the volte switch, but has not turned on the volte service. Closing method:

1. First, open the settings of the mobile phone, and click the notification and status bar.

2. Select the status icon to enter, as shown in the figure below.

3. By default, the volte function is turned on, as shown in the figure below.

4. Finally, click to turn off the volte function, as shown in the figure below.