I received this question a lot these days. I still need to understand why. Is our document library (getting) too complex maybe? Please let me know :-)
However, if you ordered your NB-IoT simcard at iot.t-mobile.nl, I can assure you that your simcard is already active.
We want to save you from the simcard hassle as much as possible. All our NB-IoT simcards have the same configuration. To make sure that you can simply keep one single stock for all your different use cases/projects,
Just register the IMEI number of your module in one of your projects. Configure your module with the right settings, put your simcard in it and it should work right away.