Absolutly the best thing you could buy for your Cell phone. I live just shy of range for my cell to work indoors, normally 1 or no bars even roam was poor, I could never use my cell in the house. Now it works great it's limited to about 20+ feet on line of site and 10 through walls.  But the one place I needed it to work and it's installed which is in my bed room it's the best money well spent regret not buying 2 years ago I have not had any service problems since I bought this even into the other rooms yes the singal fades but it's holding on were it never did before. If it doesn't help you, in MY OPINION your probably just to far from the tower or it's not set up right. My parents bought one where for Sprint there was no tower or even a roaming singal this allowed my dad and I to recieve a singal to at least roam on as the Sprint service just ain't out there THIS influenced me to buy one. On Clear line of site which isn't really how the cells are meant to be I can go about 20-30 feet and went from no bars to 2-3 in the room withing 10 feet is between 3-5 (5 being full) in the room next to me where it never worked before I recive upto 3 through the wall in the room over all this is more then sufficient for my phone to work - DATA Service great improved. I highly recommmend. Highly and I think most stuff is a scam but this is worth it. Obviously it works better if there's a stronger single outside for it to recieve like I said I'm just outside of the tower for it to work inside the the signal it here outside so this thing works great.