Three’s B2B arm sells mobile-first SME plans, wireless 5G Hub broadband for sites without fibre, and Microsoft 365 licences on a single bundled invoice. Prices are quoted ex. VAT, contracts run 24 to 36 months, and you get a separate business support line with shorter queues than the consumer 333.
At a glance
At a glance
Three Business
Updated 19 May 2026
Business products
Three Business is split into three product families. All prices verified on , ex. VAT.
SME mobile
Mobile-first SMEs
A single SIM plan or a fleet of up to 50 SIMs on one bill. Unlimited UK calls and texts on every plan, data allowances from 10 GB to unlimited 5G, all on the Three network with Go Roam included on most tiers.
Business broadband
Sites without fibre, pop-up offices
The same 5G Hub router as consumer Three, sold to businesses with a business-grade SLA, static IP option and a separate business support line. Useful for a new shop, a site office or any address waiting for Openreach.
Devices and bundles
Add productivity to your line
Three Business bundles handsets (iPhone, Samsung, Google Pixel), tablets and Microsoft 365 Business Standard licences on a single monthly bill, useful for keeping the accountant happy and getting one VAT receipt.
Selectra take
When Three Business actually makes sense
Three Business is strongest in two specific cases. First, a brand-new site without an Openreach connection: a shop opening next month, a pop-up office, a building site, anywhere you need broadband on day one and cannot wait three weeks for an engineer. The 5G Hub solves this neatly. Second, a mobile-first SME where most of the team works on the road and Three’s Go Roam and unlimited data plans actually get used.
If your business is fixed at one address with good Openreach Full Fibre, a business-grade fibre line from BT Business or a smaller alt-net is usually the safer pick, faster upload, lower latency and a fixed connection that does not depend on mobile cells. Three Business shines when mobility, no-install and quick set-up matter more than raw fibre speed.
FAQ
Three Business runs the same network as consumer Three but adds three SME-specific things: a business-grade SLA on broadband (response targets when a connection fails), a dedicated business support line with shorter call queues, and fleet billing if you have more than one SIM. Prices are quoted ex. VAT and contracts are typically 24 to 36 months.
Yes, and it is one of Three’s strongest SME use-cases. The 5G Hub plugs into a wall socket and is online in minutes. There is no Openreach engineer wait, no phone-line install and no upfront fee. The catch is the same as consumer Three: the connection only works if 5G or 4G reaches the shop floor strongly. Use the Three coverage checker against the shop postcode before signing.
Three Business resells Microsoft 365 Business Standard and Business Premium licences on a per-user, per-month basis bundled with your mobile or broadband bill. It is the same Microsoft product you would get direct from Microsoft, just billed through Three. Useful if you want a single invoice and a single account manager for SIM, broadband and email.
Most Three Business contracts run for 24 or 36 months, with 36 months unlocking the lowest monthly prices. Some flexible 1-month rolling SIMs exist but are priced higher. Broadband plans are 24 months by default. There is also an Ofcom-mandated free 30-day window to leave penalty-free if Three raises the price beyond the fixed amount written into your contract.
The Three Business support line is 0800 033 8033 (free from a UK landline) or 337 from a Three handset. Hours are typically Monday to Friday 08:00 to 20:00 and Saturday 09:00 to 18:00. For new business sales, you can also book a callback on the Three Business site. Full directory on our Three contact page.
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