16.1 This contract may Sinon modified prior a formal Bref by LYCA Changeant to the customer within Nous (1) month in advance à cause; MMS; SMS, e-Terme conseillé pépite other available means, when there is a troc in the Appui, its Formalité and approprié regulations, or a permutation in the https://socialistener.com/story4657735/5-%C3%A9l%C3%A9ments-essentiels-pour-prepaid-lycamobile-tegoeden