The card has arrived on 16.08.2019.
Can I upgrade it today (17.08.2019) to a Weekend Voordel (32 EURO) and start using it right away?
Beste antwoord door Maxime NS
I saw that you've also sent us a private message on Facebook, since you attached a link to this topic. What MoDe says is correct. It takes a month before you can make a change to your subscription. But since your subscription starts on August 19th, the first option to change it will be September 19th. When you change your NS Flex product it then again takes a month before you can make another change. After that month you can change it on whatever day you want (and then the month starts anew).