I work in an exclusive private school in the middle of a large suburban town.
We can't get or use 3G, 4G, 5G on the premises - no signal on any network, with any phone. If you hang out the window and point towards the tower you can maybe send a text or have a phone call. We get complaints from people hiring our facilities all the time (and things like contractor's phones, and card-readers never work). The local tower was supposed to be upgraded to 5G but the NIMBYs got there and blocked it.
I live in (admittedly) rural Oxfordshire. I found out the other day that my car GPS tracker that I bought over a decade ago can do GPRS tracking to a Traccar installation which I can pull into Home Assistant. I thought it was just SMS-based, and that the GPRS wouldn't actually work that well.
Then I discover that the car "disappears" in two parts of the journey on my way home down a the M40 motorway due to signal dropout. And that it never sees the car as "home" because it drops out more than 500m away from home and can't get a signal, so it just assumes it's still travelling somewhere... (which is rather annoying and I'd have to expand the limit to nearly 1km to make it reliable!).
I used to run my previous house on 4G alone - for home automation, CCTV, VPN, general browsing, gaming, downloads, etc. Never had a problem.
I can barely get Facebook loaded on my 5G phone at home where I am now, and it often drops out for even basic calls.
A friend of mine calls me about once a week on his commute home from work. The call drops out at the EXACT same point on his M25 motorway journey every time. Without fail. Just a basic GSM call.
Sorry, but coverage is still sucky. I can't remember the last time it was this bad.
I was even eyeing up a new Draytek router as they do one with 5G dual-sim built in now, and I'm not sure I can justify it. Even with external antennae, being fixed, and orienting towards the towers, I don't think I'd actually gain much if the DSL went out and I have to fall back to 5G.
Another thing that should be nationalised - the core mobile phone network should own and offer services to ALL providers from ALL towers, and everyone else is just a reseller. Because there is no way that I'm THAT disconnected from civilisation that I should be affected by calls dropping near/along the M25, the M40, and major towns on a daily basis.
Here's hoping Bezos or someone get their act together and offer a Starlink alternative that isn't run by a complete twit.