Review on 📶 4G LTE Cell Phone Signal Booster for Verizon, AT&T, and T-Mobile - Home/Office Cellular Repeater on Bands 12/17/13 by John Ruelas

I have this system to improve the signal in small suburban areas, but it is not suitable for covering longer distances and weaker signal situations. Maybe take -80dB and crank it up. It worked for me with Verizon B13. Says it will work with ATT too, but haven't done any testing with it. A directional antenna for outdoor use proved useful as it allowed increased performance through precise tower alignment. A good map of cell phone towers is helpful. What I didn't like was the shaky instructions with little information, not much detail. There is no website either. The indicator lights on the amplifier block don't say much about what's going on, and the manual doesn't describe them very well.