I have a TivoHD with 2 cable cards for Verizon Fios. Last night I pulled the #1 card and put it in my TV, after reading somewhere on here that the card activations are not device specific, and put it in my TV. My TV showed me a message saying I had to call my provide to activate the card. Now I'm paranoid that when I put it back in my Tivo it wouldn't work! I put it back in my Tivo and Tivo showed me a similar message. So I'm freaking out thinking now I'll have to call them and schedule a truck roll. I hit the Tivo button, then Live TV. I saw a picture, so I switched tuners. I saw a picture there too. It was fine the rest of the night. I never called them. Can anyone explain what was going on here? I guess I just don't understand the whole "pairing" thing. Thanks!