The cell phone signal booster work for AT&T 700MHz 4G LTE For Band12/17, it can receive the signal from the signal tower ,and then amplifier your mobile signal, solve your bad mobile network signal and enjoy your Nice time | This cell signal booster amplifier supports any AT&T phones for Wireless Carriers in the frequency range : Downlink :728-746 MHz Uplink : 698-716 MHz, , better voice quality, faster Data uploads and downloads,Get fewer dropped calls | Nice performance , Low Operating Temperature, Ultra-Low Noise Receive, High Gain, this cell phone signal booster is designed for band 12 Band17 AT&T 700mhz cellular band ,including IOS , Android, Windows Phone Systems, etc. Much faster high-speed 4G LTE internet. Perfect for people needing fast uploads and downloads for streaming apps such as Google Chrome, Safari, YouTube, Netflix, Pandora, Spotify, and other data-heavy apps. | The Mobile signal repeater booster's coverage range is about 1500-2000sq.ft, The cell phone signal booster repeater is used for Village,Garage,Basement,Home,Office , hotel, apartment and so on | FCC authentication certificate, One Year Manufacturer Warranty , All parts included in the kit , High Gain booster repeater , it's very easy to install .