If a monopolist (or dominant oligopolist) charges too much, it would encourage competitors, at least if they don't have a stranglehold through patents. There may be a sweet spot where the "free market" allows them to remain a monopolist.
Apple is sitting on 200b in cash. What would be great for consumers if they spent some of their cash on 6g networks before they turn into a sovereign wealth fund.
Anyway, such verticals integration is unlikely to be good for consumers.