Sorry for not writing in Dutch, I have been using prepaid sim card and my father got me a new sim with monthly subscription around 3 days ago. My father told me that I would get a phone call after two days to change the subscription to the phone number of my prepaid sim. However, I have received calls around yesterday and the day before with an hidden phone number (Which I've rejected), and I haven't got any today. Do T-mobile normally don't display the number when contacting the user? Also the new sim card is not provisioned yet. How would I be able to use the new subscription?