BT Mobile signal boosters for business premises
BT Mobile runs on the EE network, so a booster that carries EE fixes BT Mobile signal too. We survey, design, install and support operator-approved CEL-FI systems across the UK.
- Ofcom-compliant and legal
- Single-network or all four networks
- 4G and 5G
- Installed and supported UK-wide
Your free signal assessment
An engineer measures your building and tells you exactly what will fix it.
- BT Mobile signal, room by roomWhere it drops, and by how much.
- The best donor signalWhere the outdoor antenna should go.
- A design and a fixed quoteNo obligation, no surprises.
Why BT Mobile signal drops indoors
BT Mobile customers use the EE masts. When EE signal can’t get through the walls, BT Mobile calls drop and data stalls, even with full bars outside.
Thick walls and coated glass
Modern buildings stop EE signal, which BT Mobile relies on.
Basements and lower floors
Below ground there is often no signal at all.
Mixed providers
Staff on BT, EE and other networks all need coverage.
Rural sites
Far from a mast, there is little signal to begin with.
Outdoor EE signal, brought inside for BT Mobile users
- CaptureA donor antenna on the roof picks up the strongest EE signal we measured during the survey.
- Clean and amplifyA Nextivity CEL-FI unit boosts that signal without interfering with the network or your neighbours.
- SpreadSmall indoor antennas cover every floor, so phones get full signal wherever people work.
From survey to full signal, usually in weeks
One team does the whole job, so there is one point of contact from the first call to ongoing support.
- 1SurveyWe measure BT Mobile signal inside and out.
- 2Design and quoteAntenna plan and a fixed price.
- 3InstallOur own engineers, with minimal disruption.
- 4Test and hand overWe prove the coverage before we leave.
- 5MonitorOptional 24/7 signal monitoring. Learn more
Only legal boosters
Many boosters sold online are illegal in the UK and can disrupt the network for everyone nearby. We install only Ofcom-compliant, operator-approved systems.
EE signal before and after our installations
We survey every building before and after installation with our own survey app. These are real EE readings from recent projects.
Average signal strength (RSRP) across each surveyed floor. Usable means better than −107 dBm, the level phones need for reliable calls over 4G.
BT Mobile signal boosters: common questions
Which network does BT Mobile use?
BT Mobile uses the EE network, so any booster that carries EE also improves BT Mobile signal. You don’t need a separate system.
Are signal boosters legal in the UK?
Yes, if they meet Ofcom’s rules. Since the Wireless Telegraphy (Mobile Repeater) (Exemption) Regulations 2018, approved single-network boosters can be used without a licence. Multi-network systems need the networks’ consent, which we arrange. Unapproved boosters bought online are illegal, and Ofcom can act against anyone using one.
How long does installation take?
It depends on the size of the building. The quote includes an installation plan, and we work around your opening hours to keep disruption low.
Can one system cover every network?
Yes. A multi-network CEL-FI QUATRA system covers EE, O2, Vodafone and Three, so staff and visitors get signal whichever network they use.
Will a booster work if there is no signal outside?
A booster needs some outdoor signal to work with. The survey finds the strongest signal around your building. If there is none, we will tell you and suggest the alternatives.
Other networks
BT Mobile boosters for your building
Ready for full BT Mobile signal?
Book a free signal assessment and get a design and fixed quote.