International calls or text messages are those you place or send from Belgium to a foreign country. Roaming is when you place calls, send text messages and/or browse via mobile internet while abroad.
Today, you no longer pay any roaming charges for your mobile usage in the EU. So when you call, text or browse via mobile internet from an EU country, you pay the same as at home.
When you text, browse or call from a country outside Europe, Switzerland, Monaco and Jersey? Then you still pay the international tariffs.
Good to know: Switzerland, Monaco and Jersey are not part of the EU zone.