Boost 3G and 4G Indoor Mobile Phone Signal Strength With Just One Bar!

The Cel-Fi smart signal boosters from Nextivity are designed to improve mobile phone signal for 3G & 4G voice and data. Ideal for remote locations, areas with poor network coverage and old buildings, Cel-Fi is an all-digital signal booster that has changed the lives of many individuals and businesses. Easy to install, this plug-n-play system is the ultimate solution to boost your signal. With Cel-Fi there’s no need to miss a call ever again!


Cel-Fi RS2

The revolutionary plug and play Cel-Fi RS2 boosts poor 3G indoor signal to allow faster downloads, smoother streaming, surfing and more.

Cel-Fi RS2 strengthens 3G signal from as little as one bar to up to an incredible 5 bars. No broadband connection is needed and because the phone is not searching for far away signal transmitters, battery life can also be preserved.

Nextivity - Cel-Fi RS2

Cel-Fi PRO

The latest edition to the Cel-Fi portfolio is the PRO – a signal boosting unit that supports not only 3G, but also 4G data. The improved technology features 4 built-in antennas and the most compact units to date whilst maintaining Cel-Fi’s key signal enhancing benefits.

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 you need is one bar of 3G or 4G signal – Sit back and let Cel-Fi do the rest for you!

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 Nextivity - How It Works

Authorised Reseller Programme

Resellers can enjoy a range of benefits by becoming an authorised reseller through Frequency, including increased service offering, competitive pricing on bulk PO's, sales and marketing support and a dedicated support package for you and your customers including a support line, installation guides and troubleshooting documents. With a range of other services and an ever increasing demand for legal solutions to mobile phone signal problems, this programme is the ultimate service choice!

Blog posts relating to Nextivity

Frequency Launch Cel-Fi Authorised Reseller Programme

Frequency has recently launched an Authorised Reseller Programme in line with Nextivity’s Cel-Fi Signal Boosters. This is a great opportunity for our UK customers to enhance their service offering, especially at a time when poor mobile signal is at the forefront of recent news. With a survey by GWS finding that “40% of Brits have... Read more »

40% of the UK is suffering with poor signal coverage in their homes – but Frequency has the solution!

This week, Mobile News released an interesting article revealing that “40% of Brits have some kind of mobile blackspot in their home” with 1 in 3 reporting regular issues for in-home mobile calls. The risk of signal problems are most common in old buildings particularly around the Georgian period, with almost 55% of respondents living... Read more »

Want to see pricing?

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

Request pricing now
  • Live Data Feeds

    Product descriptions, pricing and images direct to your website

  • Instant online pricing

    Ability to order from our extensive product portfolio online

  • Dedicated account manager

    Fully trained professionals to advise on the latest accessories