I was very impressed by this Cell Phone Booster. I live in an underground, concrete dome home. Getting a cell phone signal in the house was all but impossible unless I stood outside on the porch or by a front window. With this wireless booster, I know have a signal through all 5000 square feet. It isn't an overwhelmingly strong signal throughout the house, but it works. I don't need 5 bars to make a call. Just one will do. And you live in a place that doesn't get even get that, you appreciate every bit of signal you can get.I used an existing cable that ran from the interior of the house to the "roof". Our roof is about 10-15" feet deep of earth. On the roof I planted a six foot tall post, zip-tied the antenna and cable to it and went back into the house. Attached the other end of the cable to the booster, turned it on, and I had a signal inside a concrete and steel structure 20 feet underground. Very cool!I highly recommend this booster.