Are you or your customers suffering from poor mobile signal?

The Cel-Fi 3G/4G smart signal boosters from Nextivity are designed to improve indoor mobile signal strength for devices with just one bar. Cel-Fi products are designed to address the challenges faced by businesses and consumers every day when trying to make and receive mobile phone calls in the home and office. The Cel-Fi Smart Signal Booster is licence exempt under UK law and fully meets the requirements of Ofcom SI 2018/399.

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Find our more about becoming a Frequency Reseller

Frequency Reseller Programme


Frequency Resellers can 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!

Nextivity - Find our more about becoming a Frequency Reseller

Cel-Fi DUO for Homes and Small Businesses

The Cel-Fi DUO Signal Booster greatly enhances the 3G and 4G / LTE signal and cellular service, nullifies dead zones and eliminates dropped calls. It provides 100dB of signal gain, 1,000 times stronger than traditional analogue boosters, which provide 60-70 dB of gain, making it ideal for homes, stores, offices, warehouses and small businesses in general.

Cel-Fi PRO for Small to Medium Enterprises

Cel-Fi PRO improves 3G, 4G and LTE cellular service by eliminating dead zones and dropped calls. With 100dB of gain, Cel-Fi PRO will not only improve cellular service across four (4) concurrent bands, it also reduces power requirements and extends battery life. Cel-Fi PRO systems feature an LCD color interface, are fully self-contained and self-configuring, and require no external antennas or wiring. Simply plug it in to boost indoor cellular coverage.

Introducing Cel-Fi PRO

Cel-Fi PRIME for Flats, Small Homes and Storefronts

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 not only improve mobile signal coverage, it also reduces device power requirements and extends 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.)

Cel-Fi GO X with Rugged Design for Indoor/Outdoor Use

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/outdoor 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.

Nextivity - Cel-Fi GO X with Rugged Design for Indoor/Outdoor Use

Cel-Fi QUATRA

Cel-Fi QUATRA is an active DAS hybrid solution for delivering high quality in-building mobile signal coverage in middleprise venues. It combines the best of active DAS and the Cel-Fi technologies that have been widely adopted by carriers around the world. It operates in off-air mode or can be integrated with carrier small cell equipment and operated in distributed small cell mode, creating a Supercell. Cel-Fi QUATRA can be configured with components, for single or multi-carrier environments.

  • Contact us for more information on installation

How it Works

Cel-Fi is fully wireless and easy to use. Place the Window Unit where the strongest signal is indoors, and the coverage unit in the centre of the building. All that's needed is one bar of 3G or 4G signal – Cel-Fi does the rest

Cel-Fi automatically adjusts to the size of the indoor environment served – making it ideal for home offices, multi-story homes and medium sized businesses. Cel-Fi works with most of the major phone networks including: EE, O2 and Three.

Cel-Fi by Nextivity: How It Works

Activate, Optimize, and Manage Cel-Fi products with the Wave App

Cel-Fi WAVE is the software application used for registering, setting-up, remotely monitoring, and updating Cel-Fi products. If your circumstances do change and you decide to switch your Mobile Network Operator, the app’s functionality enables you to futureproof your investment by allowing you to easily swap between Operators as and when required.

  • A dashboard overview of all your systems
  • Real-time data and performance metrics
  • Easy activation and registration
  • Operator changeover if you switch your network
  • Software update and user/group management

Frequency Reseller Programme

Frequency Resellers can 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!

Nextivity - Frequency Reseller Programme

Want to see pricing?

Frequency is a leading distributor of mobile accessories. Our diverse product range has something to suit all types of retailers.

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