how to screencast Poco X3 NFC with Samsung Smart TV using Wi-Fi connection

Guide on how to connect Poco X3 NFC phone with Samsung Smart TV using screen cast and Wi-Fi connection.
Please be sure that both your Poco phone and Samsung Smart TV is connected to the same Wi-Fi router without any block firewall. If you have poor internet connection at the time you may have difficulty trying to set it up.
Poco phone is with Android 10 and MIUI 12.
* Disclaimer * this tutorial or video is not intended to fix any broken devices, fix software issues or work for every device the same way.
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