When I travel from one town to another I don't pay different amounts for my phone calls or data. It should not be any different crossing a border within the EU

When I travel from one town to another I don't pay different amounts for my phone calls or data. It should not be any different crossing a border within the EU. It is absolutely fair, mobile operators were cross-charging ridiculous amounts to serve each others customers just so they could each milk the others customers. This type of price fixing was wrong and the EU put an end to it. As far as I can tell the telcos have survived, they're still making money and investing in 5G and the consumers are paying less. How is that not a win-win other than for shareholders of the biggest telcos?