When i bought this house, it had the Fios LNT thingy in the basement. obviously they were not too concerned about getting it back when the PO shut off his service. i was with Comcast for 2 years, then switched to Fios. They added some gizmos to the old box when they set up my service. When i shut off Fios at my old house, i think i had to send them back my router, which was fairly new, but uninterested in the LNT in the basement. At one point in the old house, i forget if it was DSL, or Fios, but i called customer service for something, and the nice lady discovered i was on set on like super slow mode, based on my (theirs really) old modem. She upgraded me to a new modem, and started giving me direction as to how to go about sending my old modem back, then she was like, "wait, ok, just throw your old modem away. its not worth the postage."