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Boundless

Multi SIM savings

More SIMs mean better value, even when you buy over time. Save up to £17.50 per SIM per month compared to EE, Vodafone, or O2.

For maximum savings, choose 10+ SIMs

1 SIM

  • Unlimited data, texts & minutes
  • Online self-service

Per SIM
£12.50
a month [1]

2 SIMs

  • Unlimited data, texts & minutes
  • Online self-service

Per SIM
£12.50
a month [1]

  • Unlimited data, texts & minutes
  • Online self-service

Per SIM
£10.00
a month [1]

10 - 15 SIMs

  • Unlimited data, texts & minutes
  • Online self-service

Per SIM
£7.50
a month [1]

For maximum savings, choose 10+ SIMs

1 SIM

  • Unlimited data, texts & minutes
  • Online self-service

Per SIM
£19.00
a month [1]

2 SIMs

  • Unlimited data, texts & minutes
  • Online self-service

Per SIM
£15.00
a month [1]

3 - 9 SIMs

  • Unlimited data, texts & minutes
  • Online self-service

Per SIM
£12.50
a month [1]

10 - 15 SIMs

  • Unlimited data, texts & minutes
  • Online self-service

Per SIM
£10.00
a month [1]

Each April, Monthly Charge rises by 4.5% [1]

Not a business owner, and not self-employed? Shop SIM for Personal

We're beating our competitors' prices

EE

Costs up to

£17.50 more
per SIM per month

Vodafone

Costs up to

£16.56 more
per SIM per month

O2

Costs up to

£16.50 more
per SIM per month

As advertised on 12 January 2024 [2]

Why choose a business multi-SIM plan?

5G Ready SIMs

Access our 5G network at no extra cost

Personal Hotspot

Connect other devices

Simple switching

Moving your number over to Three is as simple as sending a text

Unlimited data

Endless streaming, browsing, and sharing in the UK

Talk to our business experts

We're here Mon-Fri, 8am to 8pm, Saturday, 9am to 5pm.
Closed Sundays and bank holidays.

Looking to buy more SIMs?

Get the adaptable business plan with up to 250 connections.

  • Unlimited data, texts & minutes
  • Analytics on your mobile usage & spend
  • Award-winning business support
  • No daily roaming charges when you do business in Go Roam in Europe destinations

Why choose Three Business?

Terms & Conditions
 Boundless Business Offer is available to business customers who are purchasing or upgrading to Three Business 12 and 24 month Unlimited SIM-only plans. Participants who purchase Unlimited SIMs on a 12 or 24 month plan from Three (whether purchase is made in-store, online, or by telephone via our contact centre) on or after 1 May 2021 are eligible to unlock a discounted price based on the number of 12 or 24 month Unlimited SIMS (as applicable) already in existence at the time of purchase and the number of additional 12 or 24 month Unlimited SIMs (as applicable) the customer wishes to purchase. 

Prices vary between 12 and 24 month plans. Boundless Business Offer not available in conjunction with any other offer. See full terms for details: Terms & Conditions | Three.

  • Annual Price Increase

    Your monthly charge excludes VAT and includes a £5 discount for paying by a recurring method, such as Direct Debit. Each April, your Monthly Charge will increase by 4.5%. Please see an illustrative example below, showing how this would work if your Monthly Charge is £30. Please note this is not a representative example for your chosen plan. For more information, see Terms & Conditions | Three .

    Monthly Price until March 2024 - £30.00
    Monthly Price from April 2024 to March 2025 - £30 + £1.35 (4.5% of £30.00) = £31.35
    Monthly Price from April 2025 to March 2026 - £31.35 + £1.41 (4.5% of £31.35) = £32.76

    Return to reference

  • Competitor comparison

    Competitor comparison based on prices shown on Vodafone, EE and O2's website for single Unlimited Data SIMs only (24 month contract, excluding promotions) compared against Three pricing for 10-20 SIMs, 24 month contract. Prices exclude VAT. Verify at three.co.uk/terms/business

    Return to reference

Buy from our Business sales experts