> a global sim with access to unlimited data in those countries must've cost a fortune Nearly every country in the world has at least one mobile network that

> a global sim with access to unlimited data in those countries must've cost a fortune Nearly every country in the world has at least one mobile network that has a roaming agreement with Deutsche Telekom. They have negotiated rates at high volumes in the cents/GB regardless of local pricing shenanigans. DT is often the local cell providers gateway for international calling, so they have quite a bit of leverage.