[macNchz]

>I can't think of a place w/o mobile internet, even mountain treks have decent internet.

I'm not sure where you are located, but in the US there are still quite many rural areas without cell service, even in the areas fairly close to major metropolitan areas. I can drive two hours from NYC and find entire towns that have no service.

I also just got back from a two week trip around the UK, where I expected better coverage but actually found I regularly had no cell service (on the biggest mobile carrier) in the countryside, including in the center of some villages.

[rsynnott]

Note that if you were using your American phone, it's likely it does not support all bands used by UK telcos (especially since LTE became a thing, true worldphones aren't really a thing anymore). I was amazed at how terrible the phone signal was in San Francisco last time I was there, until I realised that my (European) phone only supported one of the LTE bands used in the US.