I have an H400, with TiVo Plus Lifetime, that's been freezing several times a day. When I bought it, I included a four year service plan. I spoke to Best Buy, and they said that they'll simply replace it with another model. Obviously, the H400 isn't made anymore, so it would be a more recent model. But my main concern is the lifetime status. I know it's for the "lifetime of the box." But will the service be transferable?