Why is my Smart TV not responding to the voice control feature?

1. First of all, make sure your TV and external microphone are connected properly.
2. Then, check if your microphone is positioned correctly so the TV can pick-up your voice.
3. Followed by, ensure that the corresponding voice control app is up-to-date.
4. Next, confirm that all settings in the app are set to the right parameters.
5. Finally, reset and reboot your TV and app, if necessary.