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