Yes, we have separate plans for each country so you must purchase a new plan for each country you are visiting. At this time we do not offer multi-country plans.
If you purchase a data plan and then travel to a different country, you will need to purchase a new plan specific to the country you are entering, as your original plan will not work. However, you can schedule all your plans before you go.
Note: Keep the timezone of all your destination countries in mind, when you schedule different plans.