Would buying a new phone give me better service in areas with poor coverage?

Thanks for your response. WiFi is password protected, but is widely available to the public, even though it’s supposed to be an employees-only network. The very small number of staff on-site at any given moment (1 to 2 people at times) can make it a pretty simple process-of-elimination to determine who is on.

Network settings prevent me from connecting via a VPN and the Private Relay (beta) in iCloud has also been prevented from functioning. Enabling either of those two services and attempting to connect to WiFi blocks access to the network completely.

Disclaimer: Nothing illegal/unethical, or against company policy going on whatsoever. Not looking to subvert rules or anything for any purpose. Just want to be very careful that private, personal information and communications are actually private. Was hoping to get off of WiFi and on to my carrier network instead, but there may be no good option to do so.

Thanks again for your response, gives me some things to consider.