No. You cannot use the internet at a connecting airport if it is in a country not covered by your plan.
Where you can use WiFiBOX
WiFiBOX can only connect in the countries or regions covered by your selected plan.
For example, if you have booked a plan for Italy, you can only use the internet in Italy.
You will not be able to connect at an airport in another country during a layover.
If you need internet access during your layover
Please select a multi-country plan that includes both your destination and the country where your connecting airport is located.