How many persons can I add to my CUG? There is not a maximum number of persons you can add to the CUG. There is, however, a minimum of 5 persons. Related articles Can I be in multiple CUGs? How to pay for the Closed User Group (CUG) service How to add / remove numbers on my CUG account What is the Closed User Group (CUG) service? How can I boost my network signal?