16.1 This contract may Sinon modified prior a formal Raccourci by LYCA MOBILE to the customer within Nous-mêmes (1) month in advance dans; MMS; SMS, e-Estafette or other available means, when there is a change in the service, its Clause and juste regulations, pépite a troc in the market. 4.1 https://www.becharge.be/be-nl/Kopen/herladen-Lycamobile-1-616