Setting-up Voicemail on Fairphone 2

I can’t set-up my voicemail on either on my sim cards on my new Fairphone 2. I can see voicemails coming in. I can see the voicemail numbers, but can’t seem to set my sims so I can receive my voicemails. The tutorial is for a Fairphone 1 and makes no sense when I try to look for the relevant menus on my Fairphone 2!

Is linking voicemailnumber what you’re looking for.