Three

Compare Three SIM-only deals

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Compare Three SIM-only deals — famously generous data allowances, unlimited plans and Go Roam international roaming.

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Until 2024, many mobile networks have increased contract prices in line with inflation. Starting in January 2025, Ofcom introduced 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.

*Switching from an ending 24-month handset contract to a SIM only contract. Average saving of £304 per year is based on the difference between a typical monthly handset contract cost and the cheapest available SIM only plan with an equivalent data allowance, calculated across 12 months as of March 2026. Individual savings will vary depending on your current contract and chosen SIM only deal.

Compare Three SIM-only deals — questions

Does Three have good coverage?

Three covers 99% of the UK population for 4G and expanding 5G coverage in major cities. Check your postcode on the Three website.