Cel-Fi is designed and marketed by Nextivity. We make the most powerful, most advanced cellular phone signal boosters. 

Cel-Fi Smart Signal Booster is a smart indoor coverage solution that addresses poor in-building mobile service. It eliminates the problems often found in other solutions such as having to run coaxial cables or external antennas, or the need for broadband or expensive network infrastructure. 

- Only Consumer Smart Signal Booster Authorized by AT&T and T-Mobile for use on their networks, and by another 178 network operators around the world 

- Simple and easy. Install in 5 minutes. No need for cables, antennas 

- AT&T Dual Band 3G and 4G HSPA+ on 3GPP band 2 and 5 

- T-Mobile 4G HSPA+ and 3G Dual Band (AWS, 1.9GHz: 3gpp band 2 and band 4) 

- High Capacity / large coverage (any home or building up to 13,000 Sq Ft) 

- Up to 60 calls simultaneously / 21 full speed data use (or a combination of both) 

- Fully compliant to FCC report and order for Smart Signal Boosters, Feb 2013 

- Full digital advanced technology solution, powered by two custom-made massive parallel system-on-a-chip processors 

Cel-Fi is designed by Nextivity in California. 

Indoor Mobile Coverage, Smart Signal Booster, Only Consumer Signal Booster Authorized by AT&T and T-Mobile, Advanced RF Semi Conductor Technology.

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San Diego, US
Size (employees)
81 (est)-1%
Nextivity was founded in 2006 and is headquartered in San Diego, US
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Key People/Management at Nextivity

Greg Mauro

Greg Mauro

Founder & CEO
Dan Hart

Dan Hart


Nextivity Office Locations

Nextivity has an office in San Diego
San Diego, US (HQ)
250 12230 World Trade Dr
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Nextivity Financials and Metrics

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Founding Date


Total Funding

$16.5 m

Latest funding size

$7 m

Time since last funding

4 years ago


Nextivity's latest funding round in September 2014 was reported to be $7 m. In total, Nextivity has raised $16.5 m
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Nextivity Online and Social Media Presence

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Nextivity News and Updates

Analyst Angle: A hybrid approach to IBW, beyond DAS and small cells

A conversation with Werner Sievers, CEO, Nextivity The below is only a summary. Download a transcript of the complete interview and access the complete report “Wireless in the Enterprise” Most enterprise wireless infrastructure is indoors – offices, warehouses, factories, retail outlets. The big ven…

Signal boosters for enterprise in-building wireless

The term “signal booster” is often associated with a consumer-facing product meant to amplify indoor cellular coverage often in a residential setting. However, as enterprises increasingly look to self-fund in-building wireless connectivity, more robust, business-facing products have been developed t…

There’s more to in-building wireless than DAS and small cells

In-building wireless is a red hot market, particularly given the shift from carrier subsidized deployments to enterprise- or neutral-host led financing models. To better enable enterprise buyers, equipment vendors are looking for ways to take cost and complexity out of DAS and small cells, the two s…
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