We survey, design, install and maintain Nextivity CEL-FI mobile signal systems, bringing reliable 4G and 5G coverage inside your building on EE, O2, Vodafone and Three.
Modern buildings are very good at keeping things out, and mobile signal is one of them. Insulated glass, steel frames, concrete and foil-backed insulation can turn a strong signal outside into no bars at your desk.
An in-building signal system takes good coverage from outside and redistributes it through the building, so staff, tenants and visitors can make calls and use data on every floor, on every network the system is designed for.
We handle the whole project ourselves, so one team is accountable from the first visit to sign-off.
We measure signal inside and outside your building, network by network, and note the construction and layout.
You get a clear written report of what we found, where coverage fails and what it will take to fix it.
We design a system sized to your building, choosing the right CEL-FI equipment and planning antenna and cable routes.
Our engineers fit the system with minimal disruption, working around your occupants and opening hours.
We test and tune every floor, confirm the system meets requirements, and hand over the results.
Already have a signal system that isn't performing? We diagnose and fix faults on existing installations, including systems we didn't install.
We install CEL-FI systems by Nextivity, used by mobile operators around the world and designed to boost coverage without harming the wider network. We match the system to the size of your building and the networks your people use.
Offices, factories, warehouses, hospitals, hotels and public sector sites
Shops, banks, dealerships, petrol stations, EV chargers and homes
Not sure which you need? That's what the survey is for. We'll recommend the right system in your report.
Many cheap signal boosters sold online are illegal to use in the UK and can disrupt the mobile network for everyone nearby.
The CEL-FI systems we install meet Ofcom's interface requirement IR 2102.1 for provider-specific mobile repeaters, so they can be used legally and support higher power for larger coverage areas. They work with all the UK networks and are built to be network safe.
Reliable calls and data for staff on every floor and in meeting rooms.
Large metal-clad buildings where signal struggles to get in at all.
Coverage guests expect in rooms, restaurants and basements.
Clinics, care homes, schools and campuses with thick walls and many rooms.
Shops, gyms and venues where card payments and apps need a connection.
Secure mobile connectivity for staff and systems inside shielded halls.
Coverage underground and in lifts, for payments, EV chargers and people.
Larger houses and properties in poor coverage areas.
We're based in the South East, so we can be on site quickly anywhere in London, around the M25 and across the region. We also take on projects nationwide, from single offices to multi-site estates, and we'll come to you for the survey wherever your building is.
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