Your Three Mobile SIM deal

Three Mobile SIM Deal

Uses Three Mobile's Network

Three Mobile logo

Unlimited5G data

£18.00 a monthuntil April 2026then price rises every April in contract by £2.30Price details

12 month contract

  • Three's 4G network has 99% outdoor coverage in the UK, with its 5G service available in a number of areas.

  • Three's average download speed is 38Mbps. Based on Opensignal's network experience report (September 2024).

  • Check your contract to see if it's inclusive in your plan. Extra charges may apply.

  • Cost breakdown

    Your contract

    Monthly cost for 3 months (from 1 January 2026)

    £18.00

    Monthly cost for 9 months (from 1 April 2026)

    £20.30

    Total cost

    £236.70

  • How are price rises calculated?

    Some providers set annual price rises to cover predicted changes in service costs. This is usually linked to inflation, but from January 2025 they have to tell you the exact amount upfront.

    In our breakdown, we've assumed your first bill will be next month, and your billing date falls after the date any price rises come into place.

  • Minutes and texts

    Minutes
    Unlimited
    Texts
    Unlimited

  • Truly Unlimited data

    There are no speed limits and no data caps with Three - just endless streaming, browsing, gaming and sharing in the UK.

  • 5G ready at no extra cost

    All Three SIMs are set up to give customers access to their super-fast 5G network. This now covers 54% of the UK outdoor population with average speeds of 204Mbps.

  • Three+ loyalty app

    A loyalty app for all customers that gives money off big brands - £1 coffees at Cafe Nero and £3 Cineworld tickets.

Customers must purchase the deal directly from the retailer's website. Prices, plan names and offers all based on information received from suppliers. Deals and vouchers offered are subject to availability and may not be available to existing customers. Until 2024, many mobile networks have increased contract prices in line with inflation. Starting in January 2025, Ofcom will introduce a ban on inflation-linked price hikes for new contracts. Future price changes will need to be set and fully disclosed in pounds and pence. Please refer to individual retailer's terms and conditions before applying.