You hang up to avoid a Belgacom charge, and the computer calls you back, providing you with a stateside dial tone so you can dial as if you were in the United States.
You will be charged a Belgacom fee, even if you hang up.
mnli hypothesis: You will be charged a Belgacom fee, even if you hang up. premise: You hang up to avoid a Belgacom charge, and the computer calls you back, providing you with a stateside dial tone so you can dial as if you were in the United States.