Re: Billing credit?
Thought you were "entitled to 5G service"? Better read your contract again. Every feature of every mobile provider has the caveat "where available" to CTA. If you are out in the sticks and getting 2G level service, you can't complain since there may not be any better available.
In the US, there are three main providers: AT&T, Verizon and T-Mobile. Everybody else is reselling bandwidth on their towers.