Cel-Fi GO X

by Cel-Fi

Single carrier signal booster with industry-leading 100dB gain.
Cel-Fi GO X has a rating of 4.9 stars based on 157 reviews.

Retail price: $999.00 You save: $119.01

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Product Description

The Cel-Fi GO X is an in-building signal booster system with that utilizes Nextivity’s Cel-Fi Smart Signal Booster technology to significantly boost voice and data coverage.

The GO X is different to the majority of other boosters we sell in 3 ways:

  • The Go X is a single-carrier device, and will amplify signal for just one of the following carriers at a time: AT&T, Verizon or T-Mobile.
  • The GO X offers up to 100dB gain. Unlike most of our other broadband, multi-carrier devices, the Cel-Fi Go X is not restricted to 70 dB gain by the FCC.
  • The Go X is NEMA 4 weather resistant, and can be installed outdoors.
  • Important note for Verizon customers: this device supports Verizon’s 4G LTE service only. It does not support 3G or 2G Verizon service. Most newer devices (basically all phones released since 2014) support “voice over LTE,” however if you have a very old phone or don’t have 4G LTE signal, you can’t use the GO X. (The GO X does support AT&T and T-Mobile 3G service).

The additional 30dB gain makes the Cel-Fi Go X the best solution for buildings where outdoor coverage is weak (less than 3 bars or -80 dBm RSRP).

The Go X can be used in all kinds of applications, including:

  • Homes
  • Businesses
  • Retails
  • Hospitals
  • Warehouses
  • Industrial facilities
  • Outdoor applications

Please note that the Cel-Fi GO X can only boost signal for one network at a time. If you have users on multiple networks in your building, you may need a multi-carrier booster or multiple GO X devices.

Cel-Fi WAVE Mobile App

The GO X can be easily optimized and monitored by the Cel-Fi WAVE application for iOS and Android devices. Cel-Fi's mobile app allows you to connect to the device over bluetooth and see detailed diagnostic information, including measures of signal strength (RSRP), gain, and signal quality (SINR).

Coverage Area

As with all signal booster kits, the coverage area of the Cel-Fi unit depends on two factors:

  • The number of indoor antennas you pair it with
  • The signal strength at the location where the outdoor "donor" antenna is installed.

Up to 15,000 sq ft coverage is possible in an open area by utilizing 4 indoor antennas. In a typical home or office environment, up to around 5,000 sq ft coverage is possible from a kit with four antennas. Read more below under "How many antennas do I need?"

Picking The Right Kit

Need help?

We have our own guide to setting up the Cel-Fi GO X available here. It discusses in depth some of the most common troubleshooting issues we've seen customers face.

We've put together standard kits that you can purchase to install the Cel-Fi Go X, but we can also customize a kit for your building. Simply contact us and one of our signal experts will put together a custom kit specifically for your building.

How many antennas do I need?

In general, the more antennas you have, the larger the coverage area of the system. Signal passes through cables much more easily than through walls and even through air, so adding more antennas helps expand the coverage of your booster.

As a rule of thumb, we recommend installing one antenna for every 750 sq ft to 1000 sq ft of space in a typical home or office environment that is subdivided into smaller spaces. If the environment is more open, such as in a warehouse or open office floor, you can install one antenna for every 1,500 to 2,000 sq ft.

Which kind of antenna should I purchase?

We've packaged the Cel-Fi Go X with three different kinds of antennas: a Standard Dome Antenna, an Ultra-flat Dome Antenna, and a Panel Antenna.

Standard Dome Antenna

The RSRF Dome Antenna needs to be installed in ceilings. It is best for single story buildings where you have access to a loft or crawl space, or for office buildings with ceiling tiles. A dome antenna's cable comes out of the back of the antenna, so you must have access to the other side of the ceiling in order to install it properly.

Dome antennas spread signal in all directions, the dome antennas should be installed throughout the building to provide adequate coverage.

Ultra-Flat Dome Antenna

    The Pulse/Larsen Ultra-Flat Dome Antenna is a flat version of the Standard Dome Antenna. The only benefit is aesthetic: the antennas are barely noticeable once installed.

    Panel Antenna

    The RSRF Panel Antenna has a narrower "beamwidth" - meaning that it directs signal in one direction.

    Panel antennas can be installed on a wall, which is easier in some environments. A panel antenna's cable comes out the bottom of the device, making it easier to install without requiring access to the interior of the wall. If you are installing an antenna in the first floor of a 2-story home, a panel antenna is often the easiest option, as putting a dome in the ceiling can be tricky.

    Dome antenna radiation pattern:

    Dome Antenna Radiation Pattern

    Panel antenna radiation pattern:

    Panel Antenna Radiation Pattern

    Outdoor Antenna

    The outside antenna is a SureCall SC-230W Wide-band Yagi Antenna. The SC-230W is a powerful antenna that can reach cell towers up to 30 miles away. It offers an average 10 dB of gain across all wireless frequencies (Voice/3G/4G/AWS/WLAN). It needs to be set up pointing in the direction of the cell tower, and because it is directional it will only pick up signal in that direction. The antenna comes with mounting equipment to attach to a 1 to 2 inch diameter pole. For best results, the white fiber-glass portion of the antenna should be mounted above the roof line and unobstructed in the direction of the tower.

    Kit Contents

    Cel-Fi Go X Amplifier-Only

    • Cel-Fi Go X Amplifier
    • Power Supply (15 Volt, 1.5 Amp)
    • Quick Start Guide

    Cel-Fi Go X Kits

    If you order a kit with more than 1 indoor antenna, we also include:

    The Cel-Fi GO X comes with a 2-Year Warranty.

    How it works

    how a cell phone booster works
    1 - Outdoor antenna

    The outdoor antenna receives and transmits signal to nearby cellphone towers. Outdoor antennas can be either directional or omni-directional.

    2 - Cellular amplifier

    The amplifier (or "repeater") boosts the signal coming to and from and going to the cell phone tower. The "gain" of the amplifier describes how strong the amplification is - you'll see that word scattered across our product pages.

    3 - Indoor antenna

    The indoor antenna rebroadcasts the signal inside the building. Some kits have more than one indoor antenna to help distribute the signal.


    The coverage area you can expect from any signal booster kit depends on the signal strength outside the building.

    Outdoor Signal Estimated coverage area
    Strong outdoor signal (5 bars) up to 15,000 sq. ft. coverage
    Medium outdoor signal (3-4 bars) up to 10,000 sq. ft. coverage
    Weak outdoor signal (1-2 bars) up to 5,000 sq. ft. coverage


    Like almost all of our products, the Cel-Fi GO X can be installed by anyone who feels comfortable doing simple home repairs and running cabling. If you’re not comfortable doing that kind of work, you might consider finding a local electronics installer or asking a friend.

    Unlimited free technical support:

    Anytime you purchase from RepeaterStore, you get unlimited free technical support from our signal experts. Whether it’s installing a kit or troubleshooting a problem, we’re here. In over 11 years of being in business we’ve helped over 25,000 customers install kits and improve their signal.

    Have a question now? Call us from 7am to 5pm PST: 1-800-761-3041.

    Product video


    SKU GOX-VZW-1Dome
    Coverage 5000 sq ft (1 coverage with weak signal)
    10000 sq ft (2 coverage with medium signal)
    15000 sq ft (3 coverage with strong signal)

    Customer reviews

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