I hope this is coupled with an improvement in 4G and 5G coverage, then. I quite frequently find myself on 3G only in the UK. What I don't get is why you can't

I hope this is coupled with an improvement in 4G and 5G coverage, then. I quite frequently find myself on 3G only in the UK. What I don't get is why you can't buy a plan that supports roaming on every major network. I'd pay double for a plan where my phone connects to whatever 4G or 5G is available regardless of provider, but the free market doesn't seem to have figured out this idea.