16.1 This contract may Supposé que modified prior a formal notice by LYCA Animé to the customer within Je (1) month in advance à cause; MMS; SMS, e-Courrier or other available means, when there is a échange in the service, its Modalité and ad hoc regulations, or a échange in https://www.becharge.be/be-nl/Kopen/herladen-Lycamobile-1-616