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🛈 The Cel-Fi Smart Signal Boosters are licence exempt under UK law and fully meet the requirements of Ofcom SI 2018/399. » Read More

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Cel-Fi PRO 3G / 4G Signal Booster for O2, EE, Three, Vodafone (Small / Medium Enterprises)

SKU# CK9371

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 will also reduce your cell phone’s power requirements and extend its 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.

  • 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 O2, EE, Three or Vodafone, 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.
  • Advanced technology uses built-in algorithms to boost network coverage
  • Reduces dropped calls and improves voice clarity
  • No internet broadband required

Cel-Fi PRO 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.

In stock

Excl. VAT: £708.32 Incl. VAT: £849.99
0% Finance Available
Excl. VAT: £708.32 Incl. VAT: £849.99

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Cel-Fi PRO 3G / 4G Signal Booster for O2, EE, Three, Vodafone (Small / Medium Enterprises)

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Cel-Fi PRO is a simple 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.

Cel-Fi PRO is CE and FCC approved.

Mobile Network Features

  • Up to four (4) cellular bands supported.
  • Cel-Fi PRO simultaneously supports multiple carriers with bandwidths anywhere from 5 to 20 MHz with a total system relay bandwidth of 35 MHz.
  • Support for 3GPP Rel. 10 features.
  • Support for E-UTRA bands 1, 2, 3, 4, 5, 7, 8, 12, 20, and 28
  • See Data Sheet in the Downloads section below for detailed information

Antenna technology

The Cel-Fi PRO has four internal antennas built in to the units, and an external antenna port that allows for connection to an aerial (additional aerial cable not included). The multi-directional technology seeks to find the best signal and adjust to it accordingly.

Install in minutes Installing this indoor mobile phone signal booster requires no technical knowhow, there are no complex manuals to read - it's as simple as plug-in and play.

Two units communicate wirelessly

Cel-Fi PRO consists of two units: the Window Unit (WU) and the Coverage Unit (CU). The WU sits near a window or in an area of the building that has the strongest signal from your network provider. The CU is then placed in the centre of the home or where the signal is used most.

Faster downloads

Get more from your smartphone with faster downloads, smoother streaming and improved voice coverage.

Extends your battery life

When your phone isn’t using battery to search for signal, it can save battery life for the fun stuff like downloading, making calls and taking pictures and videos.

Network Specific

Unlike other signal boosters on the market, Cel-Fi works to boost your network coverage without interfering with the network’s overall performance.


Cel-Fi systems are powered by IntelliBoost, two custom-designed core processors that specifically work to optimise indoor reception for both 3G and 4G in real-time. It provides intelligence to the Cel-Fi system and automatically adjusts itself to ensure you are always getting the best coverage.

Additional info

Please note: Whilst Cel-Fi is allowed by Ofcom, Cel-Fi devices are ultimately under the control of the chosen network. Software features allow the network to monitor Cel-Fi systems. The operating networks are able to disable Cel-Fi devices in a particular area, without any user input.

Cel-Fi PRO supports 3G and 4G and enhances their signal simultaneously.

How does it work?


Network O2 Three EE Vodafone
Product Type Signal Boosters
Window Unit Depth (mm) 110
Window Unit Height (mm) 155
Window Unit Width (mm) 179
Window Unit Weight (g) 540
SKU CK9371


Customer Reviews

It has benefitted everyone here! Review by Kimberley Noton

The product works really well and has really improved our phone signal.
Great product and would really recommend! We use this for our office and it has benefited everyone here, so easy to plug & play with no technical expertise needed.

(Posted on 16/05/2017)

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