About Us


Signalboosters is an Authorised Reseller of CEL-FI products in the UK and Ireland. They are a subsidiary of Frequency Telecom who are the Master Distributors of CEL-FI products in the UK and Ireland. Based in Epsom, Surrey, the professional and specialised sales team will provide you with the optimal CEL-FI solution to improve mobile coverage in your building. Signalboosters also have a Reseller programme.


Headquartered in San Diego, Nextivity Inc. develops the award-winning line of CEL-FI products that deliver best-in-class mobile connectivity for enterprise, small business, remote, residential, and vehicle applications. CEL-FI technology dramatically improves voice and data coverage, are self-configuring, and leverage the advanced signal-processing and radio design of Nextivity’s IntelliBoost® chipset to deliver the industry’s highest gain at the lowest cost per square foot.

CEL-FI products are carrier-approved, and unconditionally network safe; and can be remotely activated, optimised, monitored, and managed using the CEL-FI WAVE software platform. CEL-FI products are the only mobile coverage solutions authorised for use in nearly 100 countries by almost 200 mobile operators, CEL-FI covers spaces no one has covered before.

CEL-FI products are installer-friendly, provide optimal coverage and automatically adjust to changing network conditions. Solutions range from plug & play to enterprise level, but in each case provides the industry’s highest maximum gain.

The CEL-FI commitment is to protect the operator’s network, deliver the best in-building mobile performance, and be the easiest solution to install.


CEL-FI products improve signal between a mobile phone and a mobile network tower, allowing you to have clear voice conversations and a stable data connection inside buildings and vehicles. The CEL-FI solution takes the mobile signal that is available, amplifies it and rebroadcasts it in the areas where it is required.

Nextivity has worked with partners to create the CEL-FI suite of mobile coverage solutions. Starting from ground up. Nextivity engineered the award winning IntelliBoost® chipset, as the heart of the highest max gain product available in the world.

Nextivity has innovated at every step of product development, with 28 patents across hardware, software, firmware, antennas, tools, and apps. The carrier-grade products are all network safe, optimized for ease of installation and the most powerful solution in their class.


Unconditionally network safe
No interference with mobile networks or other subscribers’ signals.

Installer Friendly
Intelligent and dynamically self-configuring wireless system makes it easier to install.

Carrier approved
The only signal booster authorized for use in nearly 100 countries by almost 200 mobile network operators.

Best overall value and performance
Delivers the lowest cost per decibel of gain and square footage of coverage.

Exceptional coverage footprint
Achieve optimal voice quality and data speeds in spaces ranging from mobile to enterprise.

From enterprise to mobile
Ideal for enterprise environments, small businesses, multi-story homes, remote settings, marine or vehicles.