You can order online, call customer service, or you can visit a retail store and pick up a box. Hopefully this can get you to the right place: https://www.xfinity.com/learn/flex
I am an Official Comcast Employee. Official Employees are from multiple teams within Comcast: CARE, Product, Leadership. We ask that you post publicly so people with similar questions may benefit from the conversation. Was your question answered? Mark the post as Best Answer!