Three review

Updated September 30, 2026 · TariffCue Editorial Team · Facts checked September 30, 2026

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Our verdict

Three suits UK households that want a network's own network, plenty of data and a mid-range price, and it scores 9 overall. The Lite plan starts at £8 a month, the Value plan adds unlimited data, and the annual price rise rule nudges the bill up each April.

Key facts

Best for
Big data bundles, eSIM and phone support from a network's own network at a mid-range price.
Seller type
Network (Source, checked September 30, 2026)
SIM-only
Yes (Source, checked September 30, 2026)
Price from
£8 (Source, checked September 30, 2026)
Reference plan prices
120GB 12-month Lite: GBP11 per month, 120GB, 12 months; Unlimited 24-month Value: GBP23 per month, unlimited, 24 months; 120GB 24-month Lite: GBP8 per month, 120GB, 24 months (Source, checked September 30, 2026)
Unlimited plan price
£23 (Source, checked September 30, 2026)
5G
Yes (Source, checked September 30, 2026)
eSIM
Yes (Source, checked September 30, 2026)
EU roaming
Fair use (Source, checked September 30, 2026)
Roaming countries
160 (Source, checked September 30, 2026)
Mid-contract price rises
Each April +GBP1.80 for 4GB or less, +GBP1.90 for 5-99GB, +GBP2.30 for 100GB or more (Source, checked September 30, 2026)
Multi-line discount
Yes (Source, checked September 30, 2026)
Network coverage
99% (Source, checked September 30, 2026)
Legal entity
Hutchison 3G UK Ltd (Source, checked September 30, 2026)
Headquarters
United Kingdom (Source, checked September 30, 2026)
Support channels
Chat, Phone, Help-centre, Community (Source, checked September 30, 2026)
Billing
Contract, Rolling, Prepaid
Contract length
1, 12, 24
Official website
three.co.uk

Apps and profiles

Get the app
App StoreGoogle Play
Elsewhere
WikidataWikipediaLinkedInXcommunity.three.co.uk

Pros and cons

Pros

  • Three sells as a network, so the network, the bill and the help all come from one company.
  • The Lite plan enters at £8 a month, and Three sits at position 162 of 258 brands on entry price.
  • Coverage stands at 99%, with 5G and eSIM both available on the sim only range.
  • A multi line discount is available, so extra lines on one account can cost less than paying for them separately.

Cons

  • Three's published price rise rule lifts the bill each April, with the increase set by the data allowance, so the £8 entry figure is not the figure you keep.
  • The £8 entry price ties to the longest plan term, and available terms run 1, 12 and 24 months, so the cheapest monthly figure is the least flexible.
  • EU roaming is on fair use terms, so regular travel abroad comes with fair-use limits rather than unrestricted roaming.
Three

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Scored 9.0 / 10 by TariffCue.

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Who it suits

  • Households that want a lot of data each month and would rather deal with the network itself than a reseller.
  • Travellers who want an eSIM ready before arrival and roaming in 160 countries on fair use terms.
  • People running several lines who can use the multi line discount to bring each SIM's cost down.

Who should look elsewhere

  • yesss!, with an entry price of €0, suits readers who want a plan with no monthly cost at the start rather than Three's £8 Lite line.
  • Lonestar Cell MTN bills on contract and prepaid terms, which suits readers who want a contract or prepaid deal and not the rolling option in Three's contract, rolling and prepaid.
  • GETESA bills on prepaid and contract terms, so readers after prepaid or contract billing without a rolling option can weigh it against buying from a network like Three.

Core features

Sim only is the centre of the range, so you bring your own handset and take the plan from there. eSIM is available alongside a physical SIM, which means a compatible phone can be set up without waiting for a card, and 5G is available on the range. Coverage stands at 99%, which is a network's own footprint rather than a partner's. A multi line discount is available for anyone running more than one line, and that is usually where a household bill starts to drop. Roaming is the piece to read before a trip, because the service covers 160 countries and EU roaming runs on fair use terms.

How it compares on our data

Across the listings behind this comparison, Three sits in the middle rather than at either end. On entry price it ranks at position 162 of 258 brands, which is a fair place for a network selling large data bundles. On unlimited price it ranks nearer the front, at 107 of 173 brands, so the unlimited line is the more competitive side of the range. Put together, the picture is a network that pushes hard on its big plans and prices its entry plans to stay level with the field.

Plans and prices

Three's entry price of £8 a month belongs to the Lite plan, the line that carries a large fixed data allowance. The Value plan carries unlimited data and costs £23 a month, and it is the longer end of the range. The Lite line is the cheaper monthly figure, while the Value line is the one to budget for when data use is unpredictable. Renewal is the part to model: Three's published price rise rule adds to the bill each April, with the size of the rise set by the data allowance, so treat the entry figure as a starting point rather than a rate you keep.

The company behind it

Three is run by Hutchison 3G UK Ltd and is based in the United Kingdom, and it sells as a network rather than through a reseller. Buying from the company that owns the masts means the line, the bill and the help sit with the same organisation, which is a simpler arrangement when something goes wrong. Support runs on chat, phone and help centre, so a question can go to chat, to the phone, into the help centre or out to the community forum. For a household running a couple of lines, that breadth of support is worth weighing next to the monthly figure.

How Three compares

Frequently asked questions

What does the cheapest Three SIM only plan cost?+

The entry price of £8 a month sits on the Lite plan, which carries a large fixed data allowance and works with a handset you already own. Sim only is the main format on sale, and plan terms run 1, 12 and 24 months, so the lower monthly figure comes with a longer commitment. Billing runs on contract, rolling and prepaid terms, which suits anyone not ready to commit to a full term.

How much is the unlimited data plan?+

The Value plan carries unlimited data at £23 a month. On unlimited price, Three ranks at position 107 of 173 brands in our listings, a stronger showing than its entry price. The trade is a higher monthly figure in exchange for not tracking data use, and the longer the plan term, the lower the monthly number goes.

Does the price go up after the first year?+

Yes, each April. Three publishes a price rise rule that adds to the bill, with the size of the increase depending on the data allowance, so smaller bundles rise by less than the largest. Treat the entry figure of £8 a month as a starting point. Across the listings here, the median monthly price after a contract ends is €43.

How long is the contract?+

Plan terms come in 1, 12 and 24 month options, so the monthly figure and the commitment length move together: the lowest Lite price is tied to the longest term. Billing is available on contract, rolling and prepaid bases, and the rolling option is the one to pick if you would rather not sign up for a full term at all.

Is Three a network or a reseller, and is 5G available?+

Three sells as a network, so the company supplying your line is the company that runs the masts, and 5G is available on the range. Coverage stands at 99%. Support and billing both sit with the same organisation, which removes the usual step of chasing a host network about a fault.

Can I use an eSIM with my own phone?+

Yes. Sim only plans are the main format on sale, so you use a handset you already own, and eSIM is available, which means a compatible phone can be set up without waiting for a card to arrive. That suits people travelling or upgrading, since the line can be ready before the new handset is in your hand.

What does roaming cost when I travel?+

Roaming reaches 160 countries, and EU roaming runs on fair use terms, so fair-use limits apply rather than unrestricted use. Read the terms before a long trip, since a heavy month abroad can sit outside what the allowance expects. The Lite plan at £8 a month is the entry point, and the same roaming terms apply across the range.

How do I get help from Three?+

Support runs on chat, phone and help centre, so a question can go to chat, to the phone, into the help centre or out to the community forum. The help centre is the place to start for eSIM setup or roaming. Since Three is a network, the help you get comes from the same company that runs the network.

Is there a discount for a second line?+

A multi line discount is available, so a household running several lines can bring the cost of each SIM down against separate accounts. That is where the entry price of £8 a month stops being the whole story: the effective cost per line falls as you add more of them on the same account.

Sources

  • three.co.uk checked September 30, 2026

    Backs: Headquarters, Legal entity, Multi-line discount, Mid-contract price rises

    “Registered in England and Wales | Registered company number: 03885486”

  • three.co.uk/sim checked September 30, 2026

    Backs: Billing, 5G, Contract length, Price from, Reference plan prices, SIM-only, Unlimited plan price

    “30-day, 12 and 24 month contracts and Pay As You Go”

  • three.co.uk/support/contact-us checked September 30, 2026

    Backs: Support channels

    “Start a live chat; Call us on 333; help and support hub; Three Community”

  • three.co.uk/support/roaming-and-calling-abroad/roaming-ab... checked September 30, 2026

    Backs: EU roaming, Roaming countries

    “Inclusive roaming in 49 Go Roam in Europe destinations”

  • three.co.uk/support/sim-support/esim checked September 30, 2026

    Backs: ESIM

    “eSIMs are virtual SIMs installed on your device”

  • three.co.uk/why-three/network checked September 30, 2026

    Backs: Network coverage, Seller type

    “Our 4G network covers 99% of the UK population”

Compiled from 6 source pages, checked September 30, 2026. We did not open an account.

Three

Three

Big data bundles, eSIM and phone support from a network's own network at a mid-range price.

9.0/10See alternatives

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