I just purchased a used/ (new never activated) 522 receiver from a gentleman that moved into an apt that provided free cable so the unit sat in his closet still in the box. According to what I have read, these receivers did not use a seperate smart card, the card info was built onto the main board. I have read a few post where some users have had to get a new G3 card in order to activate the 522 receivers. Anyone have any first hand experience with these receivers and any problem with activation? I called Dish Customer support and gave them the R00xxxxxxx receiver number to confirm it could be activated. They said it had never been activated so it sould not be a problem. They did not mention having to get a new smart card.