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Cell phone signal booster aims to boost AT&T T-Mobile 4G 700MHz Band 12/17 signal, help improve voice&data speed, stop missed/ dropped calls, support multiple user at the same time. Please Note: 1.This cell signal booster could only work with ATT T-Mobile 700MHz 4G LTE Band 12/17 network frequency. 2.This at&t signal booster could only make the weak signal stronger, it couldn't generate any signal, so the Outdoor Antenna should receive 2-3 bars of stable signal in the location where it is mounted, or the booster couldn't work very well. Operation Frequency of Signal Booster: Band 12/ 17 Uplink:698MHz-716MHz,Downlink:728MHz-746MHz Emission Designator:LTE(G7D) AGC LEVEL:Uplink:-45.00 Downlink:-56.00Max.Antenna Gain:Uplink:8.1dBm Downlink:7.85dBmiFCC Classification: B2W/Wideband Consumer Booster(CMRS) Installation Guide for Mobile Signal Booster:1.Please kindly download Network Cell Info Lite (free app) to find out the nearest ATT cell signal tower. 2.Connect the 50ft coaxial cable to the Outdoor Yagi Antenna,then keep the Outdoor Yagi Antenna point at the nearest ATT cell signal tower. 3.Mount the signal amplifier device in your house where is near from the power socket, and have good ventilation 4.Tightly connect the 50ft coaxial cable to the OUTDOOR port of the repeater 5.Tightly connect the 16ft coaxial cable to the Indoor Panel Antenna and the INDOOR port of the signal booster. 6.Connect the power adapter to the signal amplifier. Packing Details: Cell Signal Booster Outdoor Directional Yagi Antenna Indoor Directional Panel Antenna Outdoor 50ft Coaxial Cable Indoor 16ft Coaxial Cable Screws for Mounting English User Manual