In reply to norrisdan71:
I had similar issue for Austria, Germany, and USA. I found, like here, in many towns and certainly big cities, airports there are phone shops who will advise the best action; likely a SIM for their service providers;
Just for safety issues in the mountains I bought a minimalist phone and deal in the USA; $20+ a few years back.
When I updated my Smart phone I kept the old one; they have different providers, 02 and Three. I take both so I when I venture out in the hills I am likely to obtain a signal in emergency. I tell her indoors I will not be in daily/regular contact. Check your route online to see what phone reception is possible.