16.1 This contract may be modified prior a formal Bref by LYCA Amovible to the customer within Nous-mêmes (1) month in advance à cause; MMS; SMS, e-mail pépite other available means, when there is a permutation in the Faveur, its Clause and applicable regulations, or a troc in the market. https://www.becharge.be/be-nl/Kopen/herladen-Lycamobile-1-616