Is the CoreESIM Brazil plan valid for neighboring Argentina (e.g., Iguazu Falls) or other South American countries?

CoreESIM's Brazil-specific plan is geo-restricted to the national borders of Brazil. If your travel includes destinations like Iguazu Falls, your data connectivity will cease once you cross into Argentina. Similarly, the plan does not extend to other South American nations. For itineraries encompassing multiple countries, CoreESIM advises selecting a regional South America eSIM plan to maintain continuous data service across borders, ensuring uninterrupted connectivity from Rio de Janeiro to Buenos Aires.