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What makes our network better for business?

Your connectivity is the foundation on which to build your business. Our digital first 5G network gives you the competitive edge in innovation, increased efficiency, and smarter remote working.

More about our network

According to Ookla®, our 5G's the fastest around. [2]

Powering UK businesses

99% outdoor UK coverage

Our combined 4G/5G network covers 99% of the outdoor population.

Committed to 5G

With 4,700 5G sites across 650 UK towns and cities.

Built for data

Our customers use 2.3 times more data than the average UK user. [1]

Proud to be the network offering businesses more

We're built digital-first

Our network is future-proof. We’re built digital-first from the ground up, partnering with the best in the market to provide a seamless experience. This is best for your business, your team, and most importantly your customers.

Data is in our network DNA

We're building capability for high-data traffic, and our unlimited data plans are designed with your business in mind, enabling you to use your data however your business needs it. Enjoy the flexibility to achieve your business goals. All this with the latest technology, and a fully virtualised Cloud Core Network.

We've got you covered

As The UK's Fastest 5G network [2], we offer the competitive edge. Our 19 data centres connect teams, clients, and remote customers. This is why so many organisations in the healthcare, construction, and aviation industries have chosen the resilience of our network.

Work abroad for less

A great business needs efficiency and flexibility. With Three Business roaming solutions, you can stay connected no matter where you are in the world, without going over budget

Going the extra mile for customers

Why Spotted Bee trusts Three Business to deliver reliable 5G

"For us it was simple: the 5G offering and the price. We chose Three Business first and would not want to move.

Our Three Business connection is fast and reliable, and the Three network is now working better than ever.

I have a point of contact to help me resolve any issues that crop up and flex our connections up and down as needed."

Rob Galkoff, Managing Director at Spotted Bee

Coverage and network status checker

New to Three Business? Use the coverage checker below to see if you can access our award-winning 5G network. If you’re already with us, you can use the network status checker to see if we have maintenance going on.

Our 3G network

We’ve now switched off our 3G network across most of the UK to give you a better experience on our 4G and 5G networks. 

We aim to completely switch off 3G in remaining areas by November 2025.

Please go to our 3G switch off page to find out more. 

Check coverage in your area

Enter your postcode

Things that can affect your signal

Building materials

Unfortunately, no network can tell you how strong your signal will be indoors. That's because the signal strength needed to pass through walls and windows varies from building to building.

Issues with your device or account

Your SIM card, phone settings, a low battery, and running older software can all affect the signal. If your account is on hold, that will also prevent use of the network.

Location

The closer you are to a mast, the stronger your signal. It can also be affected by geographical things, like hills, valleys, forests, etc.

Extreme weather

Strong winds, flooding, storms, falling trees, etc. can all affect phone masts.

Temporary structures

Cranes or scaffolding, for example, can obstruct the signal.

Temporary network outages

When we're carrying out planned or unplanned maintenance, your signal will probably be affected.

3G network switch off

We’ve now phased out our 3G network across most of the UK. You may have reduced 3G coverage or no 3G coverage at all. If you’re using a device compatible with 4G Calling, you’ll be able to access our 4G network where it’s available. 

Check if your device is compatible with 4G Calling.

Keeping your business connected
 

Frequently Asked Questions

They're the 4th and 5th generations of mobile network. The main difference between them is the speeds they can reach, with each generation hitting faster speeds as they go along. This affects how smooth your online experience is.

Our 5G Business Broadband hub could get you online as soon as tomorrow, with unlimited data. No landline. No engineer. No waiting - just plug in and work. It's broadband, but better.

Location’s usually the main thing that affects coverage – if you’re far away from a mast, your signal will be weaker.

But coverage can also be affected by things like trees, being in a basement or underground, travelling, and even your phone itself. Getting higher up, opening windows, and upgrading your phone can all help improve your signal.

5G Business Network blogs

How 5G connectivity is transforming British industry

impact-poor-connectivity-uk-smes

The impact of poor connectivity on UK SMEs

5G Business Broadband buyer’s guide

  • Enders Analysis

    As of Q1 2025* Three continued to carry the largest proportion of the UK’s mobile data, for the seventh consecutive quarters, carrying 34% in Q1 2025.

    On average a Three customer uses around 33.8GB of mobile data per month, this is 2.3x the UK average of 14.4GB

    Three remains the only network to carry over 1 Exabyte of data in a quarter, a record which has stood for three consecutive quarters**

    * Enders Analysis – UK Mobile Market in Q1 2025

    **1 Exabyte is approximately 1 billion Gigabytes of data.

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  • Ookla

    Ookla® Speedtest Intelligence® data, 1H 2025. All rights reserved.

    Visit speedtest.net/awards/fastest-5G to find out more.

    Return to reference