0800 & 0808 (freephone) numbers are generally completely free to call - they have no service charge or access charge and don't eat into your phone plan's free laps allowances. I have a unlocked phone, plaisant my SIM ut not work in that phone. My phone says it is invalid https://www.becharge.be/be-fr/Acheter/recharges-Lycamobile-Belgium-1-6