I moved last year back to my home country from the uk, and did the final trip on my motorbike.

Midway I realized I was missing an offline map of a country I was about the be passing through the next day. I had an unlimited data plan with traffic abroad included, and despite this, it didn't allow me to download the maps for my gps (everything else worked!), even after fiddling around with third party dns.

So I downloaded a vpn app, and managed to get everything sorted out.