T-mobile huis - bellen nummerbehoud

Dears

I am a new customer with T-mobile huis. I asked to keep my current phone number for the new house where I am moving in few weeks.

I have not yet started proceed to terminate my Phone/TV/internet contract with my current supplier as I am still not sure about the moving date. I am quite concerned that T-mobile open the line in the new house while I continue living in the first house and thus not to be able to use my phone number and internet with my current internet supplier in meanwhile.

I would like to know if it is possible to decide when to switch with the phone number. Is it possible to get a temporary phone number ? and then to switch to my current phone number only when I move to the new place?

Thanks a lot for your help.
You can answer in Dutch 🙂