How (and Why) to Disable 2.4GHz Wi-Fi on Your Network
 

Technology is an odd duck: in less than twenty years, Wi-Fi has gone from an amazing (and expensive) luxury to an assumed inclusion in every device you own. And yet, there’s plenty of room for improvement…which is why you should consider disabling the old 2.4GHz band on your home’s Wi-Fi network and using the newer, faster, less crowded 5GHz band exclusively.

https://www.howtogeek.com/318695/how...-your-network/