Hi @esralto, welcome on our community. 

That's a very good question. In this case it involves taking over the entire mobile subscription from another person, in this case your husband. This is called a contract transfer. You can submit this transfer online along with the required documents. Alternatively, this can also be done in a KPN store near you, but both of you must be present.

Small note: Is there a credit/loan active for a mobile phone? If so, the credit must first be paid off before the transfer can be completed. 

Thank you!

You're very welcome.