State-of-the-Art Signal Boosting Products

The Cel-Fi product line is the best solution on the market for addressing the universal challenge of poor cellular coverage in the office, at home, or on the go.

What Is “Smart” Cellular Coverage?

Nextivity Inc. develops the award-winning Cel-Fi products that optimize cellular coverage in enterprise, business, residential, and transportation applications. Cel-Fi products are self-configuring, carrier-approved, and unconditionally network safe; leveraging the IntelliBoost chipset to deliver the industry’s highest gain at the lowest cost per square foot. Cel-Fi is authorized by 200 carriers.

Explore Our Recommended Solutions & Products

See why Cel-Fi delivers best-in-class coverage


  • Scalable All-Digital PoE Cat5e Active DAS Hybrid for Middleprise
  • Up to 100 dB (1000x Stronger Signal)
  • Single or Multi-Carrier Solution
  • 3G / 4G / LTE for Voice and Data
  • Carrier-Approved and Unconditionally Network Safe

Cel-Fi GO X

(with antennas)

  • Coverage up to 15,000 ft2 (1,500 m2)
  • 100 dB system gain
  • Perfect for remote and rugged environments
  • Indoor/Outdoor NEMA 4 Rated


(with antennas)

  • Coverage up to 15,000 ft2 (1,500 m2) per system
  • 100 dB system gain
  • Built for bands 1, 3, 7, 8 and 20
  • Ease of setup


(with antennas)

  • Coverage up to 15,000 ft2 (1,500 m2)
  • 100 dB system gain
  • Built for FirstNet bands 12 and 14 coverage
  • Indoor/Outdoor NEMA 4 rated 

Cel-Fi GO M

(mobile kit)

  • Multi-user
  • Up to 70 dB system gain
  • Perfect for vehicles, trucks, fleets, RV’s and Marine
  • Multi-Carrier Support with Carrier Switching

Cel-Fi Antennas & Mounts

  • Regulatory Approved Antennas for Cel-Fi products
  • In-Building Antennas
  • Outdoor Antennas
  • Automotive Antennas
  • Marina Antennas
  • Mounts

Book A Free Consultation

Reach out today and lets begin the conversation. A consultation is free, and can be as involved or brief as you would like it to be. Our variety of installation professionals would love to speak with you. 

Frequently Asked Questions:

What is Cel-Fi by Nextivity?

Cel-Fi is Nextivity’s brand of self-configuring, environmentally aware, indoor coverage solutions. Each Cel-Fi system consists of two units. The Network Unit is placed in the area where the strongest native signal can be received from the carrier network (signal levels as low as -120 dBm are acceptable). The Network Unit comprises a transmitter and receiver which communicates with the cell tower. The Coverage Unit is placed in the center of the home, communicates wirelessly with the Network Unit and “lights up” the interior of the house with significantly enhanced signal levels, thus enabling better quality calls and greater data throughput.

What makes Cel-Fi so different from other signal boosters?

Cel-Fi is a smart signal booster. That means it relies on intelligent, self-organizing algorithms to ensure you benefit from the largest area of coverage without compromising or interfering with your mobile operator’s networks or impeding other subscribers’ signals. Cel-Fi does not require any new equipment, any configuring, or any changes to existing network infrastructure or mobile devices. It is also a plug and play device, which means that there is no need for professional installation, no drilling, and no cables. In addition, Cel-Fi has been recognized for its superior design and effectiveness and is the only consumer booster authorized for use by the communications commissions in Australia and the United Kingdom, and the only Smart Booster designed to meet the new FCC Safe Harbor 2 specifications that allow very high gain (very high signal gain is necessary to make low level signals useful in a large coverage area).

What coverage can I expect from a Cel-Fi system?

The radius (half the width) of the coverage bubble is approximately the distance between the Coverage Unit and Network (window) Unit. Here are some examples:

  • Radius = 20 meters (66 ft.) for wood framed walls
  • Radius is less for concrete interior walls
  • Radius can easily exceed 65 meters (200 ft.) for open commercial spaces
Can Cel-Fi boost the signal of multiple cellular networks at once?

Cel-Fi signal boosters are Operator specific, and will only boost one Operator’s channels at a time. Being Operator specific is one of the main reasons that we are network safe and can provide 100 dB of signal gain, and why we are the only signal booster approved by a growing number of Operators.

What technologies does Cel-Fi support (3G? 4G? 5G)?

Cel-Fi system will support 3G(UMTS/WCDMA), 4G (HSPA/HSPA+) and LTE. Each Cel-Fi system is different. Check your box for a Quick Start Guide, or visit the support section for more specific information about your specific product.

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