16.1 This contract may Si modified prior a formal Bref by LYCA Mouvant to the customer within Nous (1) month in advance via; MMS; SMS, e-Messager or other available means, when there is a troc in the service, its Modalité and ad hoc regulations, pépite a change in the market. https://www.becharge.be/be-nl/Kopen/herladen-Lycamobile-1-616