Anytime you want as there is no restriction on when you do this.
__________________________________________________________________________________________ If someone has helped you then please click on the LIKES button in their post. If you need help please provide as much information as you can
As noted, you can change your mix every month. If you mean to add a device that will require a credit & affordability check. (No one can advise in advance whether you would be accepted)
I am just another Sky customer and my views are my own even if you don't like the answers
