I figured I would ask here since every time I call Dish I hangup in a bad mood. A friend gave me two receivers and a single dish 500 new in the box. I will keep the dish and accessories for spare parts. My question is, can I call Dish and activate the 4900 and use it as a spare receiver? This past weekend my 622 died and I am without Dish until the replacement comes. It would be nice to have a spare on hand when it happens again.