Totally depends on how they want to bill you. I'm in the ATL with 3 cards in 3 devices and I'm now getting charged $0 1st + $1.50 2nd + $9.95 3rd - $7.50 credits or around $4/mo. for all 3. When I got the third card they tried to stick me with 2 outlet fees but with chat I got them to charge $1.50 for the second card. There's no way you can get more than 1 extra card at that rate, I've tried many times. If you want 2 cards, you *may* be able to get them to bill you at $0 + $1.50 but that's not guaranteed, more likely it will be $0 + $9.95 - $5 credits. There is no HD tech fee, and the $9.95 is the bogus additional outlet charge. Agree that the rate sheet says $0 for first card in a device, but they will get you for outlet fees regardless. Filed an FCC complaint about it that went nowhere, because they are supposed to charge a uniform rental for each card and they clearly do not - it varies widely by area.