How to check if my add-on works ?

Hi all!
I bought 2 add on to call in France but I'm not sure how it's works and what I have to do to call France by using them. Do you know how to verify and be sure that my calls will not be charged in my wallet ? do you know if my second add on will automaticaly be use after the end of the first one ?
Many thanks for you help !


This discussion has been closed.