I bought this item for my new apartment because the signal here is weak. I loose a lot of calls but there is good signal next to the window. I set the box up, but the instructions say it needs 15 feet of VERTICAL clearance between the base unit and the antenna. I separated them as much as I could; however, it would only work while I was standing right next to the base unit. maybe a 3' to 4' radius. If you can set the antenna on the roof, 15 or more feet above the base unit it might work. I sent the item back, and Amazon gave me a full refund.