As per papashaun comment. Had the same issue when I changed from EE to Vodafone. A simple call to customer service enabled it for me... reboot of phone and the options appeared.
------------------------------------------------------------------------
User: Smiley
If my reply has been useful in resolving your issues, then please like and 'mark as solution'.
-
My life is full of positives and negatives. I’m an electrical engineer.
------------------------------------------------------------------------