The Cel-Fi GO X is an in-building signal booster system 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 100 dB 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 30 dB 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.
The Cel-Fi GO X can boost the following bands:
- AT&T bands: B2, B4, B5, B12
- Verizon bands: B2, B4, B5, B13
- T-Mobile bands: B2, B4, B5, B12
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).
5G DSS Upgrade
With various forms of 5G rolling out across carriers, 5G support is increasingly important!
The Cel-Fi GO X is the only consumer grade signal booster capable of relaying 5G-DSS at 100 dB of gain.
Dynamic Spectrum Sharing (DSS) is used by some carriers to transmit 4G LTE and 5G in a single “hybrid” channel. 5G DSS Support on the GO X is enabled on by a software update. Once updated, the GO X is capable of automatically connecting on existing 5G DSS bands.
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.
Which outdoor antenna should I purchase?
We offer two different outdoor antennas with the Go X: a Standard Log periodic Antenna, and a Grid Parabolic Antenna. Both antennas comes with mounting equipment to attach to a 1 to 2 inch diameter pole
Standard Log Periodic Antenna
The Wideband Log Periodic Outdoor Antenna is a powerful antenna that offers up to 10 dBi of gain across all 4G LTE and 5G frequencies. 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.
Griddy: The Grid Parabolic Antenna
Griddy: The Grid Parabolic Antenna is an ultra wideband, ultra directional parabolic grid antenna. Griddy adds up to 26 dBi of gain across all 4G LTE and 5G frequencies.
If you have line of sight to your cell tower, Griddy can help make signals considerably stronger and clearer.
We can't stress this enough - Griddy has a very, very narrow beam width and only “sees” a very narrow horizontal and vertical aperture. This means it will take some additional careful aiming to get dialed in. Even a 1-2 degree variance can make a huge difference.
How many indoor 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 indoor antenna should I purchase?
We've packaged the Cel-Fi Go X with two different kinds of antennas: a Standard 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.
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:
Panel antenna radiation pattern:
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
- Cel-Fi Go X Amplifier
- Power Supply (15 Volt, 1.5 Amp)
- Quick Start Guide
- Installation Guide
- 1x RSRF Wideband Outdoor Log Periodic Antenna
- 2x RSRF SMA-male to N-female Pigtail Adapter
- RSRF 50-Ohm N-Male Lightning Surge Protector
- RSRF Universal J-Mount Antenna Mount
- 2x RSRF 30 foot RS400 Low-Loss Coaxial Cable with N-Male Connectors
If you order a kit with a Grid Parabolic outdoor antenna, we also include:
If you order a kit with more than 1 indoor antenna, we also include:
- RSRF N-Female Signal Splitter (2-Way or 4-Way, depending on kit)
- 1 ft RS200 N-Male Ultraflex Jumper Cable
- 1x or 3x (in addition to existing 1x) RSRF 30 foot RS400 Low-Loss Coaxial Cable with N-Male Connectors (quantity depends on number of antennas)
The Cel-Fi GO X comes with a 2-Year Warranty.
This product can expose you to chemicals including Nickel, which is known to the State of California to cause cancer, and Bisphenol A, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to 
This particular kit is intended for use in a home or office. However we do offer the Cel-Fi GO+ (waveform.com/products/cel-fi-go-m) which has all the power and diagnostic capability of the GO-X but comes with accessories specifically suited for a car or truck.
In particular it has a magnetic mount antenna for outside the car, a directional indoor antenna and a DC power supply which plugs into your vehicles cigarette lighter, making it more suitable for use in a car. In addition it comes with an AC power supply if you needed to transition to a home power source.
Feel free to reach out to us at [email protected] if you have any other questions, we are happy to assist!