I have an older (2005) Sharp Aquos that has a cable card slot. It had worked fine with RCN with a single channel card. I switched to Fios last week. The multistream cards that the installer brought dont seem to work with this TV. The cards work fine in my Tivo. They left me an STB at no extra charge for the set, but I'd prefer the cable card, and one less box and remote in my living room.