When you use your mobile to call, surf or text another country from Belgium, it is the international rate by country that is applied.
And the roaming charges?
One speaks of roaming when your telephone uses a mobile network abroad.
Åland Islands (Finland), Austria, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, French Guyana, Germany, Gibraltar, Greece, Guadeloupe (French Antilles), Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Martinique (French Antilles), Mayotte, Netherlands, Poland, Portugal, Réunion, Romania, Saint-Barthélemy (French Antilles), Saint Martin (French Antilles), Slovakia, Slovenia, Spain, Sweden, and the United Kingdom + Iceland, Liechtenstein, and Norway. Don’t forget, Switzerland, Monaco and Andorra are not part of the EU