>A bit like the sure signal thingies that Vodafone used to sell but multi provider ideally.

They're still readily available.

But yeah think this would need a legislative push to solve. Force high rises to host multi provider relays as you say and hook it into their fiber links.

> What would really help is the easy provisioning of signal boosters.

But that's also a physics thing. Plain same-frequency boosters hamper frequency reuse on neighbor cells, so less bandwidth for you. And if boosters run on a separate band, you'd need to do frequency planning for them just like it's done for cells now.

Wireless is finicky, we should really avoid using it everywhere wired can be used instead.