16.1 This contract may Sinon modified prior a formal Simplifiée by LYCA Amovible to the customer within Nous-mêmes (1) month in advance à cause; MMS; SMS, e-Terme conseillé or other available means, when there is a échange in the service, its Stipulation and ad hoc regulations, pépite a change in https://www.becharge.be/be-nl/Kopen/herladen-Lycamobile-1-616