@Briananash It may be faulty or not done as expected, you can see the EE help on it would also set it up close to the EE Hub to start with then move to were it is needed, still has to be able to connect to the Hub if not will go red. Just plug your phone into the back off the EE Hub until you get it sorted.
Set up and use a Digital Home Phone Adapter | Home Phone Help | EE
