To control the remote of your LG TV, first you need to download the "LG Smart TV" app. Once you've downloaded the app, the setup procedure is very simple. After the app detects the connected device, it's time to select the channels you want to watch on your TV. All you have to do is touch on the channels you want, and you're good to go.

After selecting the channels, you can control the volume of each channel using your smartphone's volume key. And you can use the volume keys for all the channels you want.