16.1 This contract may be modified prior a formal Abrégé by LYCA Amovible to the customer within one (1) month in advance par; MMS; SMS, e-Courrier or other available means, when there is a change in the service, its Stipulation and approprié regulations, pépite a permutation in the market. Heb https://www.becharge.be/be-nl/Kopen/herladen-Lycamobile-1-616