A. 1. Check your device's volume settings and ensure that the volume is turned up and not muted. 2. Use headphones or earphones to see if the issue is with the device's speakers. 3. Ensure that the app has the necessary permissions to access the microphone by going to Settings > Apps > VooV Meeting > Permissions. 4. Restart the app and your device to clear any temporary glitches. 5. Test the microphone and speakers with another app to ensure they are functioning correctly.