1. First, click to open General in the settings interface.
2. Then, click Accessibility - Mono Audio, set "Single Audio Channel" to off, and set the phone's noise cancellation function to on, as shown below:
3. Return to the settings interface and click Privacy.
4. Click on the microphone and set ICBC USB Shield and ICBC to enabled status, as shown in the figure below:
5. Connect the mobile phone adapter to ICBC USB, and then connect it to the Lightning interface of the mobile phone.
6. Finally, open the ICBC App to check whether the USB shield information can be read normally. Make sure that the USB shield battery is still charged. A USB shield that has not been used for a long time may not be usable. You need to charge the USB shield before using it.