I'm still forced to have garbage service because my note 8 keeps forcing me to connect to a neighbor Network extender. I'm in a office complex so I have no clue who owns it, let alone am I going to walk around trying to find it. I can't fathom why Verizon forces you to use an extender if one is in range and not give you an option to disconnect. Breach of contract law suit?
Are you verifying you are connected to a Network Extender by dialing #48? What if you open a browser and go to whatsmyip.org? If it's a 4G extender it might show the IP you are entering the Internet from which could help identify the service provider the extender user is using. A mobile tool like Net Analyzer might also identify the IP the extender is using for internet access by doing a trace(route).