Are you interested in becoming a Frequency Telecom partner? Join our Reseller Programme and get involved in the distribution or resale of CEL-FI Mobile Signal Boosters by Nextivity.

Signalboosters is a subsidiary of Frequency Telecom who are the Master Distributors of CEL-FI products in the UK and Ireland. When you sign up to become a CEL-FI partner, you will join the Frequency Reseller programme.

In a recent study, Ofcom revealed that 32% of UK homes and businesses still do not receive 4G coverage indoors from all network operators. With numerous businesses affected by poor mobile signal (including the public sector and public services, police departments, fire stations, agricultural businesses and the NHS to name a few), Nextivity has developed award winning mobile signal boosters that are licence exempt and freely deployable in the UK and Ireland for Voice and Data*.

CEL-FI offers a unique selling proposition for an increased service portfolio as well as offering additional revenue opportunities. Become a CEL-FI Partner and enjoy a range of benefits including:

  • Competitive pricing on bulk purchases
  • An increased service offering with a quick delivery service
  • Technical support for you and your customers, e.g. a support line, technical guides, troubleshooting advice and installation guides and videos
  • Sales and Marketing support and a dedicated support package for you and your customers including a support line, installation guides and troubleshooting documents.


  1. CEL-FI by Nextivity offers the only range of repeater solutions that are compliant with Ofcom’s new licence-exempt requirements (IR2102) and legal to use in the UK. CEL-FI solutions are also licence-exempt under ComReg requirements for Ireland.
  2. CEL-FI Signal Boosters work to strengthen poor mobile signal coverage in the home and office by up to four times, offering a massive 100dB gain (CONNECT, GO, EVO & QUATRA units)which is 1000 x stronger than traditional boosters.
  3. The Specific Absorption Rate (SAR) is comparable to that of a smartphone, making them equally harmless to human health and the environment.
  4. They boost 3G / 4G / 5G signal at the same time, most traditional boosters only cover either 3G or 4G but not both.
  5. CEL-FI solutions enhance mobile signal in indoor areas from as little as 80 m² / 1,000 ft² up to 11,600 m² / 125,000 ft². Multiple units can easily be combined to cover larger areas.
  6. Boosting mobile signal in the way CEL-FI units operate, apart from reduced dropped calls, also means improved voice clarity and streaming as well as faster downloads and improved battery life for the devices benefiting from them!
  7. A strong mobile signal has become a necessity, while the issue is not being resolved over time. Anyone living or working behind thick walls or heavy insulation, in basements or in rural / remote areas will be most likely facing mobile signal issues.

With an ever-increasing demand for legal solutions to mobile phone signal problems, this programme is the ultimate service choice!


CEL-FI by Nextivity offer licence exempt mobile phone signal boosters to boost 3G / 4G / 5G for voice and data for any UK network, including the four main Network Operators (EE, Three, O2 and Vodafone) as well as all hosted Virtual Network Operators like BT Mobile, giffgaff etc. Please see our Networks page for more information. Find out more on the CEL-FI products and see the full range here.


If you’re interested in finding out how to become a CEL-FI Partner, please get in touch via the contact form and we will get back to you to discuss the opportunity.

If you have any questions we will be happy to assist you.

* Licence exempt and fully complies with Ofcom's UK Interface requirement 2102 (IR2102) (UK) and ComReg S.I.No.283 of 2018 (Ireland).