Originally Posted by
Calcifer
We just used what was included in our TMobile plan for free for our January trip and had no issues with navigation (of course we used wifi while at hotels).
Agreed. My T-mobile allows free data in international countries. I have been able to use google maps, call a rideshare vehicle, and make calls/messaging via Whatsapp etc.
When I want to make and receive calls over wifi for free, I put my phone on airplane mode and ensure that I am connected to wifi wherever I am.
I really don't think OP needs to pay $50 extra a month for the international plan, but if your plan does not include the free data abroad, then perhaps that is a consideration.