What to do if the sound can’t be heard on the camera side during a call of the Xiaomi Outdoor Camera BW300?

Please refer to the following troubleshooting steps:
1. Check whether the sound on the cell phone is adjusted too low, resulting in no sound;
2. Check whether the Mi Home APP has obtained permission to use the microphone (recording) of the phone. If not, please open the relevant permission in the phone settings.