Cel-Fi Go X smart cell phone signal boosters are the newest in the smart signal booster line-up by Nextivity. At 10 dB gain, they provide cellular signal boost with highest possible Gain in its class. However, unlike simultaneous multi-carrier mobile signal amplifier kit solutions we provide, these provide single wireless service carrier signal enhancing solution. Available for major service USA carriers such as Verizon Wireless, AT&T Wireless, T-Mobile, US Cellular and GCI Alaska. Also available for major Canadian cellphone service providers including Rogers Wireless, Bell Mobility, Telus Mobility, Freedom Mobile, Videotron and EastLink.