I installed this unit at my vacation home in Maine where towers are few and interferences are many. My home is on a river bank behind a ridge so it's tough to get any kind of signal. I still haven't figured out how to get a good digital TV signal. This signal booster did work. I raised the signal on my Tracfone from one bar to two bars which was enough to stop dropped calls. It raised a friends tracfone from 1 bar to 4 bars, he had a Motorola, I have an LG. The Tracfones use 800mhz. I also have a T-mobile Nokia phone (1900mhz) that could't get any signal there and now gets up to 3 bars. I can now read my emails up there. Very satisfied. Installation is critical. You must have the height separation and the horizontal separation -- will not work without it. Also must rotate the antenna on the signal booster to maximize signal. Signals are worse on humid days, best at night. Someone standing between you and the booster can interfere with the signal. Requires a lot of fiddling to get it right but sure beats getting into my truck and driving to the top of the hill to make a phone call.Ken