- The full-duplex intercom function is turned off:
Go to the preview screen, press and hold the “Intercom” button and speak. The device section can hear the phone’s sound, the phone’s audio is turned off, and the device’s sound cannot be heard. - The full-duplex intercom function opens:
Go to the preview interface and open the intercom function. The device section can hear the phone’s sound, and the phone can also hear the device’s voice.