I just purchased a new LG smart TV and thought of connecting it to my Android mobile phone. I found an option on my TV to connect it to phone. I searched a few apps on Google Play Store and lastly found an app namely Miracast Screen Sharing. It made my life easy because now I can view everything I have on my mobile on 32 inches TV screen.
If you want to know how to troubleshoot it and make it possible, go through the below video created by me. I have showed step by step details in the visuals that could make you learn this process.