Media Kit


Market Challenge
There are several factors that can contribute to poor reception of wireless indoor signals, including buildings, trees, natural obstacles and distance from the cell tower. An estimated 17%-25% of all mobile users worldwide experience poor quality indoor wireless coverage, translating into well over 1 billion subscribers globally experiencing pain.

Solving the Problem
Cel-Fi is the first of a new generation of signal boosters. The carrier-grade, plug-and-play Cel-Fi consumer signal booster is fully digital, developed using the most advanced technology, and delivers 1,000 times more gain than the previous generation of analog boosters to maximize a user’s indoor wireless experience by eliminating in-building dead zones. The Cel-Fi Window Unit captures the cellular signal that reaches the building, improves it and retransmits the signal indoors via the Coverage Unit. Cel-Fi can more than quadruple wireless data speeds and eliminate dropped calls for wireless subscribers in their homes or offices by boosting signal strength from one bar to five bars. Recognized for its innovative design and advanced technology, Cel-Fi is authorized for subscriber use by more than 137 operators worldwide.

Cel-Fi is ideal for small and medium-sized businesses and for use in multi-level homes. It provides one of the largest coverage footprints in the market – up to 13,000 square feet – with enough capacity for many simultaneous calls and high-speed data connections. As a completely plug and play solution, Cel-Fi eliminates the need for external antennas, cables, ladders, and drilling, ensuring that even the most non-technical customer can install the system in a matter of minutes.

What is Cel-Fi

How it works

Developed by Nextivity
The Cel-Fi Smart Signal Booster is developed by California-based Nextivity Inc. The company’s veteran engineering team has leveraged advanced signal processing and intelligent antenna design to develop the world’s only self-configuring, environmentally aware indoor coverage systems.


Poor mobile signal reception and dropped calls are challenges that consumers face almost daily. While mobile operators recognize this is an issue, they have historically adopted an extremely strict policy against the use of consumer-class boosters and legacy repeaters on their networks due to interference and damage caused by these systems on their networks.

After March 1, 2014, those who have relied on many legacy signal boosters or repeaters to help improve their cell phone signals will no longer be able to use them. The Report and Order for signal boosters defined by the Federal Communications Commission (FCC) in February 2013 means consumers will now only be able to use signal boosters that are approved for use on their wireless carrier’s network.

Cel-Fi was designed according to the requirements of the new Report and Order for service provider specific signal boosters as defined by the Federal Communications Commission (FCC). It is also the first consumer booster authorized by T-Mobile and AT&T for use on their wireless networks, and over 137 leading global mobile operators. Cel-Fi is also the only consumer booster authorized and approved by the communications commissions in Australia and the United Kingdom,

Cel-Fi relies on intelligent, self-organizing algorithms to maximize the area of coverage for users and ensure it does not compromise or interfere with mobile operator networks or impede other subscribers’ signals. Cel-Fi does not require any new equipment or changes to existing network infrastructure, or mobile devices.

Having Cel-Fi tested and authorized by AT&T for use on its network (AT&T has never before allowed the use of a consumer booster on its network) is testament to Cel-Fi’s unconditional network safety and ease of deployment.


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Cel-Fi Media Factsheet

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Werner Sievers, CEO

A veteran of the wireless industry and an experienced leader of technology-centric, venture backed start-ups. A complete bio is available online.

Michiel Lotter, CTO

Experienced wireless executive and author of several journals, conference papers and books. Invented 14 issued patents. A complete bio is available online.

George Lamb, VP Operations and Support

Mobile industry veteran with extensive experience working with global carriers. Author of two books on mobile communications and inventor of multiple wireless patents. A complete bio is available online.




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