I got this from a Sky installer today..... whilst the Sky installer was putting in my second Sky+ box, I remarked that I was about to decorate the room where the first box was, and that I would have to figure out a way to keep it connected. He told me that I should force the box to "phone home" from the services menu before I disconnected it. "It confuses the system" he said. "Sky won't ask it to phone home again for another 6 months". I've no idea whether this advice is true or not, so take it with a pinch of salt.