Cel-Fi by Nextivity

The most advanced technology for improving in-door mobile coverage

Cel-Fi smart signal boosters from Nextivity are the best solution on the market for addressing the universal challenge of poor in-door mobile coverage.

The Cel-Fi mobile signal booster range includes solutions for apartments or flats, small and large residential properties, storefronts, offices and commercial properties as well as large enterprise environments like distribution centres, government buildings and hospitals.

Cel-Fi products are designed to improve mobile signal strength with up to 100db gain for 3G and 4G in voice and data.

The Cel-Fi commitment is to protect the operator’s network, deliver the best mobile performance, and be the easiest solution to install.

Frequency Telecom is a master distributor of Cel-Fi products in the UK and Ireland.

How it works

Cel-Fi automatically adjusts to the size of the indoor environment and leverage the advanced signal-processing and radio design of Nextivity’s IntelliBoost chipset to deliver the industry’s highest gain at the lowest cost per square foot.

Cel-Fi is available for EE, O2, Vodaphone, Three and all Mobile Virtual Network Operators. The Cel-Fi commitment is to protect the operator’s network, deliver the best mobile performance, and be the easiest solution to install.

CEL-FI is licence exempt in the UK and fully complies with OFCOM SI 2018/399

Case Studies

Storey Logo



Regional Supermarket Distribution Centre

Hounslow Civic Centre

Hounslow Civic Centre

Pure Offices

Henry Construction

Welsh Ambulance Service NHS Trust

NHS Welsh Ambulance Services Trust

Epic Centre Lincolnshire Showground

RDaSH NHS Foundation Trust

Rotherham Doncaster and South Humber NHS Foundation Trust

NHS Hywel Dda University Health Board Logo

NHS Hywel Dda University Health Board

Become a Cel-Fi Reseller

Frequency Cel-Fi Resellers enjoy a range of benefits including competitive pricing on bulk PO’s, sales and marketing support and a dedicated support package. With an ever-increasing demand for legal solutions to mobile phone signal problems, this programme is the ultimate service choice!

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Cel-Fi PRIME is a simple mobile phone signal booster that strengthens your 3G or 4G signal coverage. With 80dB of gain, Cel-Fi PRIME will improve mobile signal coverage and reduces device power requirements to extend battery life.

PRIME offers plug-and-play mobile signal coverage for a flat, storefront, kiosk, apartment, offices or similar space, enabling clear and reliable connections within a coverage area of up to 100m2 (approximately 1,000 sq.ft.)

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The Cel-Fi SOLO Smart Signal Booster is designed to solve mobile coverage problems for voice and data. With up to 100dB of gain, it is the most powerful carrier-grade solution available.

The Cel-Fi SOLO covers up to 1,500 m² of indoor space per system and is quick and easy to install. It includes a whip antenna and patch antenna which can be used to get the system up and running in minutes.

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The Cel-Fi GO X Smart Signal Booster is a premium mobile phone signal booster that strengthens your 3G or 4G signal coverage. It is the first carrier-class indoor mobile coverage solution to feature industry-leading 100dB signal gain and Nextivity’s unconditionally network safe guarantee.

Cel-Fi GO X leverages the award-winning Intelliboost signal processing to deliver the industry’s largest coverage footprint with the best voice and data wireless performance.

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Cel-Fi QUATRA is a scalable in-building mobile system for delivering high-quality signal in venues up to 200,000 sq. ft.

This all-digital solution is cost-efficient and easy-to-deploy. It combines the best of active DAS and Smart Booster technologies that have been widely adopted by carriers around the world, setting a new standard in Signal Boosting capabilities.

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Glance-able view to the state of your Cel-Fi environment, including the Boost Strength indicator

Change the default Network Operator, select the booster technology (3G, 4G), setup an external antenna, configure the antenna position, and more.

Get real-time data and performance metrics for troubleshooting devices

Keep your Cel-Fi Booster up-to-date as new software versions become available

Easily activate and register your Cel-Fi Booster.


Unit 44, Barwell Business Park
Leatherhead Road, Chessington
Surrey, KT9 2NY, United Kingdom


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