I would be curious about the underprovisioned thing... that's very possible. I travel to the US frequently (well before the world turned upside-down) and I would say in 8/10 US cities I visit I experience frustratingly worse cell coverage than I do at home. Slow speeds, call drops, etc. This isn't just on my personal phone but also on all of the cellular devices we bring with us. (we provide equipment for trade-shows, etc. and much of it runs 4G). I hadn't considered network provisioning as a possible cause of this.