Nextivity Cel-Fi DUO 3G/4G Mobile Signal Booster

SKU: Nextivity Cel-Fi DUO
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The Cel-Fi DUO Signal Booster greatly enhances the 3G and 4G / LTE signal and cellular service, nullifies dead zones and eliminates dropped calls. Its area of coverage and signal gain make it ideal for homes, stores, offices, warehouses and small businesses in general.

  • Provides 100dB of signal gain, 1,000 times stronger than traditional analogue boosters, which provide 60-70 dB of gain
  • Creates a bubble of approximately 40 metres of coverage or 13,000 sq. ft. / 1,200 m2, equivalent to 5-10 times larger coverage than most boosters
  • Boosts both 3G and 4G signal coverage, for EE or Three, and all hosted MVNO under the Network of your choice
  • Plug-n-Play - Sets up in 5 minutes. No installation required.
  • Enhances reception and signal strength which result in reduced battery requirements on mobile phones and extended battery life.
  • Reduces dropped calls and improves voice clarity
  • No internet broadband required
  • Cel-Fi DUO is CE and FCC approved and Ofcom licence exempt.
  • Easily switch between boosting EE or Three signal using the WAVE App

Cel-Fi DUO is CE and FCC approved. Cel-Fi Smart Signal Boosters are licence exempt under UK law and fully meet the requirements of Ofcom SI 2018/399

You must have at least one bar of signal somewhere in the building.

£540.00 (inc. VAT)

In Stock

Available: 44





This Cel-Fi Smart Signal Booster is licence exempt under UK law and fully meets the requirements of Ofcom SI 2018/399.



Cel-Fi DUO is a premium mobile phone signal booster that strengthens your 3G or 4G signal coverage. Perfect for the home or office, this compact technology allows you to boost your 3G voice and data as well as 4G data coverage inside, allowing support for up to 20 devices simultaneously.



The Cel-Fi DUO Signal Booster greatly enhances the 3G and 4G / LTE signal and cellular service, nullifies dead zones and eliminates dropped calls. Its area of coverage and signal gain make it ideal for homes, stores, offices, warehouses and small businesses in general. (Please remember, you must have at least one bar of signal somewhere in the building.)



  • Provides 100dB of signal gain, 1,000 times stronger than traditional analogue boosters, which provide 60-70 dB of gain.
  • Creates a bubble of approximately 40 metres of coverage or 13,000 sq. ft. / 1,200 m2, equivalent to 5-10 times larger coverage than most boosters.
  • Boosts both 3G and 4G signal coverage, for EE or Three, and all hosted MVNO under the Network of your choice.
  • Enhances reception and signal strength which result in reduced battery requirements on mobile phones and extended battery life.
  • Reduces dropped calls and improves voice clarity.
  • No internet broadband required.
  • Cel-Fi DUO is CE and FCC approved.




With 100dB of gain, the Cel-Fi DUO mobile signal booster will improve cellular service, and reduce your cell phone’s power requirements to extend its battery life. The Cel-Fi DUO covers up to 13,000 sq. ft. (approximately 1,200 m2) of indoor space per system. It’s fully self-contained and self-configuring, requiring no external antennas or wiring. Simply plug it in to boost indoor cellular coverage.



Technical Specification:



  • Compatible with: EE, Three and all hosted Networks (3G and 4G)
  • Support for Band 1 (2100 MHz) and Band 3 (1800 MHz)
  • Certifications: CE, FCC, RoHS, IC, EAC, R&TTE, EN, SRRC
  • Power Consumption: Full uplink: 30 Watts / Idle: <20 Watts
  • Physical Specification: Network Unit: 158.5 x 146 x 59mm (560g) / Coverage Unit: 158.5 x 146 x 59mm (390g)
  • Electrical & Environmental Requirements: 12 VDC / 0 to 40 Celsius




Activate, Optimize, and Manage Cel-Fi products with the Cel-Fi 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.



It provides a glance-able view to the state of your Cel-Fi environment and includes:



  • 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 management
  • Users and group management




The Cel-Fi Wave App is available for iOS, Android, PC and Mac devices.