This is dumbing down the whole thing Sire. Why did ATT increased the fees by $1 and not $10 then ? Also you can literally chose from many many other telecom operators. I use T Mobile and my car has ATT. ATT is way better than TMobile for coverage may be the extra fees help them give better coverage ?
(Also what is the alternative ? Trump controlled government servants to decide how much fee they can raise ? At that rate we will be like UK where you need a license to own a TV).
The question is simple economics, specifically game theory.
What's the contract between the parties? Is it one sided, and allows arbitrary modifications by the service provider? (Check.) Is the telecoms market currently in a pathological (unhealthy) state, due to lack of sufficient number of competitors, due to gigantic barriers to entry, due to regulatory capture? (Check.)
Infrastructure is typically something that benefits from standardization and economies of scale. The original network effect. Therefore it's very much a "natural monopoly". But combined with spectrum auctions, it's a proper state sanctioned monopoly, or in this case oligopoly.
The solution is to separate the raw technical network operation from all the other shit, and make it a true common carrier. The hard problem is of course the network evolution (maintenance, tower allocation [add new or remove old, what kind of tower, where, when], backbone management [buy new fiber optic or sell old, or downgrade, what kind, from where to where, and when]), but this should be financed by the operators, and it could very well be operator contracted (when one operator feels they would benefit from a new tower, they would request that from the shared raw network provider, and pay for it).
Of course, there could be incentives to help the roll out of new towers (so, let's say the operator that pays for it gets 1 year exclusive access on that tower), or that the operators must finance at least X new towers every year or pay a fine (but this must be formalized so they must spend X % of their revenue on extending the network to new customers, and at least Y% on upgrading the existing network), etc.
Ultimately, it's a simple question, that leads to a hard problem, with very good approximate answers. We know this shit, it's the economics of a market of fungible service providers. It's the shit that got people Nobel-like prizes in Economics, because it's easy to model and show what's going on.
(Also what is the alternative ? Trump controlled government servants to decide how much fee they can raise ? At that rate we will be like UK where you need a license to own a TV).