Can't connect to ring using phone network

Hello Had this since jan 2021 and its not worked ever. I can't view live using cellular network. I've contacted ring and uninstalled and reinstalled everything. Even reset network like they requested to get this working No joy. They said to contact 3 my network. I have and followed there instructions and we found that it work on 3g not 4g and up. They state the app is not designed or enabled for 4g and up connectivity and to go back to ring. I'm simply going back and forth. Does anyone know what the problem is? I have a Samsung s10e upto date software including all apps upto date Ring 2nd gen and fimwire upto date Resolution will be greatly appreciated. Thanks