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Boundless.
Multi SIM savings.

Connect your team with our Unlimited Multi SIM plan. The more you buy, the better the value.

View Boundless plans below

How it works.

Buy a single Unlimited data SIM and save 28% over our competitors:

1 SIM      £17.00

The more SIMs you buy, the less you pay per SIM, and per month.

Monthly price per SIM:

2-4 SIMs      £10.83 each (Save 28%)
5-9 SIMs      £9.17 each   (Save 39%)
10-14 SIMs  £8.33 each   (Save 44%)
15+ SIMs     £7.50 each   (Save 50%)

Price excludes VAT at 20%:24 month plan.

Choose your Boundless plan.

Get a call back to choose the number of SIMs you need.

  • Unlimited
    data

    £15.00 a month



    24 month plan
    Unlimited minutes
    Unlimited texts

    Unlimited
    data

    £17.00 a month



    12 month plan
    Unlimited minutes
    Unlimited texts

  • With Personal Hotspot, you can use your phone’s data allowance to connect up your other devices. Pretty handy for when you’re nowhere near a Wi-Fi connection. On our Essential Plans, you can’t use your inclusive data allowance to create a personal hotspot.

    With our Advanced plans, you can unlock your UK allowances for 24 hours in Go Roam destinations. It’s £2 in Go Roam in Europe, and £5 in Go Roam Around the World destinations. Republic of Ireland and Isle of Man are excluded from the daily roaming charge. Our Fair Use Policies apply.

    With Personal Hotspot, you can use your existing data allowance to connect other devices to your phone and get online. Pretty handy when there's no Wi-Fi.

    The 5G revolution is upon us. And from launch, all new and existing customers with a 5G Ready device can join the party. Whether you are on a contract, SIM only or PAYG.

    Got a 5G Ready handset now? Sweet. All our SIMs are 5G ready at no extra cost. Obvs. And as soon as 5G comes round your way, you’ll be able to frolic in 5G wonder.

    You’ll be able to upgrade your data plan whenever you need. To enjoy 5G at full pelt, with uncapped speeds, choose an Unlimited data plan - so you never run out of data juice.

    With a business plan on Three, you get up to £500 worth of benefits from our partners to support your business. From creating stationery with Moo, to nailing the accounts with a 6-month FreshBooks subscription - we’ve got you covered, whatever your business needs.

    Our Business plans let you use Go Roam Around the World in 71 destinations, at no extra cost. You can also use your phone as a Personal Hotspot, and call free from your mobile to Customer Services.

    Use our Advanced plans in 71 destinations around the world, for a low daily charge of £2 for Go Roam in Europe and £5 for Go Roam Around the World.

    With our Essential plans you’ll save some money on your contract but miss out on features such as Go Roam Around the World and Personal Hotspot allowance, although you’ll still be able to use Go Roam in Europe. For limits and further information - see Three.co.uk/go-roam.

    Comes with Adapt 25, and Adapt 50.


    Unlimited minutes, texts, and data, across your team.

    So you won’t be stuck overspending, worrying about data limits or second guessing how much you’re using.


    Award-winning business support.

    Whatever you need, our experts are here.

    • Award-winning, dedicated business support from our Business Service Team.
    • Get in touch for technical help, and all your account queries.
    • Call direct, or chat to the team online.

    Three Analyst Standard.

    Your online analytics tool, with 24 hour access to your mobile usage and spend.

    • Accessible insights on your Three Business spending and usage, anytime, anywhere.
    • High level data exports. Download, file, and keep track of your costs.
    • Easily digestible, accessible bill summaries, and personalised reports to your inbox.

    Upgrade to the Complete service plan any time. You can get Three Analyst Standard as an Add-on to any Three Business account.

    Comes with Adapt 75, Adapt 100, and Adapt 250.


    Unlimited minutes, texts, and data, across your team.

    So you won’t be stuck overspending, worrying about data limits or second guessing how much you’re using.


    The only business plan of its kind with a dedicated Customer Success Manager.

    Your person to contact, whatever you need.

    • A business-dedicated, single point of contact for all your account queries.
    • Owning your enquiries, leaving you to focus on work.
    • Regular account reviews on what you need, and how we can help.

    Three Analyst Advanced.

    Your online analytics tool, with 24 hour access to the mobile usage and spend of your whole team.

    • User-level analytics on the usage of your entire team. The insight to make better decisions.
    • Bespoke or favourite reports on your usage and spend, straight to your inbox.
    • Unlimited export of data. Download all the details, and stay in control of your account.

    You can get a Customer Success Manager, and Three Analyst Advanced, as Add-ons to any Three Business account.

Why choose Three for Business?

Terms and Conditions

Boundless Business Offer is available to business customers who are purchasing or upgrading to Three Business 12 and 24 month 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 14 January 2021 are eligible to unlock a discounted price) based on the number of 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.