Almost every cambio car can be opened with the cambioApp. However, for some underground stations there is an exception. Make sure that you brought along a cambio-card (available through customer service) when you pick up the car in one of the stations mentioned below. If a cambio card is required, it will also be mentioned in your reservation confirmation.
Stations where the cars cannot be opened using the cambioApp:
Antwerp:
Leuven:
Gent: