How to adjust the volume balance with a mobile phone?

One plus 8t volume balance closing method:

1. First, open the setup software that comes with the mobile phone system.

2. Then, slide down in the setting interface.

3. Next, find the smart assistant option in the sliding interface, and click Enter.

4. Then click the first option in the smart assistant interface: auxiliary function.

5. Finally, slide down on the barrier-free interface to find mono audio, and the left and right channels can be turned on and off through the sliding switch at the back.