SIM-only

12 Month SIM Only Deals UK — Compare & Save

12 Month SIM Only Deals UK — Compare & Save

A 12 month SIM only deal gives you the perfect middle ground — lower monthly costs than a rolling plan, without locking you in for two years. You keep your existing phone, pay only for your data, calls, and texts, and enjoy a fixed price for the next 12 months. Switch compares every live deal from O2, EE, Vodafone, Three, Sky Mobile, iD Mobile, VOXI, Tesco Mobile, and more — so you always see the cheapest 12 month SIM only deals in the UK in one place.

Switch services are provided at no cost to you, but we may receive a commission from the companies we refer you to. If a deal is “promoted” on Switch's tables, then it has been lent additional visibility as a result of us securing exclusivity on a great deal, or a commercial agreement to showcase what we believe to be market-leading value to consumers. Learn more about how our site works.

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.

12 Month SIM Only Deals UK — Compare & Save: questions

What happens when my 12-month contract ends?

You roll onto a rolling monthly contract at the same (or sometimes higher) rate. Switch or renegotiate to stay on the best deal.