I lost 2 networks (CBS and ABC). I already had an outside antenna and single dongle to my H3. That setup could get the 4 major networks. However, I could not record all 4 at the same time anymore. I called in to get a dual tuner dongle sent to me. The CSR said that he could not do that, but could have a technician come to my house and install a new antenna and a dual tuner dongle at no cost to me. Seemed like an overkill , but I accepted the offer. The Tech came today and tried to replace the single tuner dongle with the dual tuner one. He tried scanning a couple of times and could not get 1/2 of the stations the single dongle could find. He then replaced the outside antenna with the dish supplied antenna and scanned again . That got more stations than the single dongle could get. He had no idea as to why that should happen. Seemed odd to me also. However, my problem was solved. Since all the wiring was in place to my house TVs , the total install time was about an hour.