Three Business Mobile Deals UK April 2026 | Unlimited Data from competitive rates/Month
Compare The Networks is an OFCOM regulated, independent comparison service helping UK businesses find the best telecoms deals since 2008. We compare Three business mobile deals from EE, Vodafone, O2 and Three so you can make an informed decision.
We are rated 4.3 out of 5 on Trustpilot from over 1,000 reviews, and our service is completely free. The networks pay us, not you.
Get a free quote tailored to your business, or keep reading to learn more.
Three Business Mobile Deals
Three is one of the four major UK business mobile networks. Here is what you need to know about their business offering in 2026.
We compare Three deals alongside EE, Vodafone, O2 and Three so you can see whether Three is genuinely the best option for your business, or whether another network offers better coverage, pricing, or features at your locations.
Three Business Plans
Three offers a range of business mobile plans including SIM only deals, handset contracts, and multi line accounts. Plans typically include unlimited calls and texts with varying data allowances.
| Plan Type | Typical Price Range | Contract Length |
|---|---|---|
| SIM Only | From £6+VAT/month | 1, 12, or 24 months |
| Handset Contract | From £11+VAT/month | 24 or 36 months |
| Multi Line (5+) | 10 to 25 percent discount | 24 or 36 months |
Is Three Right for Your Business?
The answer depends on coverage at your locations, your budget, and what features matter to you. Three has strengths, but so do the other three networks. The only way to know is to compare.
Compare Three against all four networks with a free, no obligation quote.
Why Compare Rather Than Going Direct?
When you go directly to Three, you only see their deals. You have no way of knowing whether EE, Vodafone, O2 or Three would offer better coverage or pricing for your specific situation. Our comparison is free, OFCOM regulated, and takes under 60 seconds.
Frequently Asked Questions
Why is Three popular for business mobiles?
Three offers the cheapest unlimited data plans in the UK at approximately £11+VAT per month for business SIM only. They also have strong 5G coverage in urban areas and simple, transparent pricing with no hidden fees.
How much are Three business mobile plans?
Three business SIM only plans start from approximately £11+VAT per month for 1GB. Their unlimited data SIM only plan is approximately £11+VAT per month, the cheapest unlimited option from any major UK network. Handset contracts start from around approximately £11+VAT per month.
Is Three 5G coverage good for business?
Three has strong 5G coverage in major UK cities and towns, with over 300 locations covered. Their 5G speeds average 80-150 Mbps. Coverage is excellent in urban areas but less extensive in rural locations compared to EE.
Does Three offer multi-line business discounts?
Yes. Three offers volume discounts for businesses with 5 or more lines, typically saving 10-15% per line. For larger fleets of 20+ lines, bespoke pricing is available through Compare The Networks.