SIM-only

Unlimited Data SIM Only UK — Compare the Best Deals

Unlimited Data SIM Only UK — Compare the Best Deals

Keep your phone. Ditch the data worries. An unlimited data SIM only deal gives you all the mobile data you need — for streaming, browsing, hotspotting, and everything else — without paying for a new handset you don't need.

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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.

Unlimited Data SIM Only UK — Compare the Best Deals: questions

Is unlimited data really unlimited?

On most major UK networks, yes, truly unlimited with no fair-usage policy. Always check the small print before buying.