16.1 This contract may be modified prior a formal notice by LYCA Changeant to the customer within Je (1) month in advance dans; MMS; SMS, e-Courrier or other available means, when there is a échange in the service, its Modalité and ad hoc regulations, pépite a troc in the market. https://jaidenwmcqe.ageeksblog.com/32778278/faits-sur-mijn-gsm-opwaarderen-met-lycamobile-revealed