Bests & Worsts Reviews from Amazon

Yes, this item works well. But yes, it takes some RF and electronics knowledge to make it work right. For me, I have verizon cell phones operating in the 800MHZ cell band in my area. In my house we had zero to 1 bar and could make calls but they were frequently dropped or cut in and out. We could walk down the block and the signal was better. Our house sits in a depression and most of the cell signal was going over the top of our house. To really make this thing work well I would recommend the following tips: 1) Get cell phone for which you know how to enable DEBUG mode and get an actual NUMBER for the signal strength it is receiving. 2) Go ahead and purchase the optional YAGI directional antenna for this unit. 3) Buy an approximately 4 x 8 ft. piece of radiant barrier ( a type of insulation available at home depot made of aluminum). 4) Mount YAGI antenna in rafters of house or outside on roof. 5) Mount cell extender about 3 feet from the floor in the top living level of your house in a center location of the house. 6) Place radiant barrier in attick directly between the 2 antennas. This will help improve the signal separation a lot and will make this thing work. 7) Power up cell extender. If when you power it up you get ANY flashing amber lights, then your signal isolation between the two antennas isn't good enough and you must do something about it (move antennas, get YAGI with higher gain, etc.) If you get no amber lights on startup then the device is operating at max or almost max amplification and power output (only 1/2 watt but plenty for a single house). We now have 3-5 bars all over our house, deck, porch, and even garage! Calls are clear and there is no breaking up or dropping of calls. We have 2700 sq ft. house with 2 stories plus a basement. I am using a 10dbi antenna from some guys out of New York I found on the internet. I paid $99 for this antenna because they told me it was a 17dbi antenna, but they lied. However, it works and I am happy with what works... Running continously for 2 months now without a single glitch. Zero maintenance when installed correctly. There are 2 different models for the 800MHZ and 1900MHZ cell bands. BE SURE TO BUY THE CORRECT ONE FOR THE PHONE CARRIER YOU HAVE.