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.

List of deals (80)

80 deals · from 4 retailers · Updated 26m ago

Mozillion 1GB SIM Only, 12-month

Mozillion
1 GBof 5G data
12 month contract
£2.75a month
£33.00 upfrontEffective £5.50/mo
£66.00 total cost
  • NEW
Buy now
at MozillionDeal details

Mozillion 3GB SIM Only, 12-month

Mozillion
3 GBof 5G data
12 month contract
£3.75a month
£45.00 upfrontEffective £7.50/mo
£90.00 total cost
  • NEW
Buy now
at MozillionDeal details

Lebara 5GB SIM, £4.50/mo, 12 months

Lebara
5 GBof 5G data
12 month contract
£4.50a month
No mid-contract price rise£4.50 upfrontEffective £4.88/mo
£58.50 total cost
  • NEW
Buy now
at LebaraDeal details

iD Mobile SIM Only on 5G 12GB (12 Month contract) with Unlimited mins…

iD Mobile
12 GBof 5G data
12 month contract
£6.00a month
£0.00 upfront
£72.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

Mozillion 10GB SIM, £6.50/mo, 12 months

Mozillion
10 GBof 5G data
12 month contract
£6.50a month
£78.00 upfrontEffective £13.00/mo
£156.00 total cost
  • NEW
Buy now
at MozillionDeal details

O2 SIM Only on Classic (12 Month contract) with Unlimited mins & texts…

O2
10 GBof 5G data
12 month contract
£7.00a month
£0.00 upfront
£84.00 total cost
  • No upfront cost
Buy now
at O2 MobilesDeal details

iD Mobile SIM Only on 5G 15GB (12 Month contract) with Unlimited mins…

iD Mobile
15 GBof 5G data
12 month contract
£7.00a month
£0.00 upfront
£84.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

iD Mobile SIM Only on 5G 25GB (12 Month contract) with Unlimited mins…

iD Mobile
25 GBof 5G data
12 month contract
£7.00a month
£0.00 upfront
£84.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

iD Mobile SIM Only on 5G 15GB (12 Month contract) with Unlimited mins…

iD Mobile
15 GBof 5G data
12 month contract
£7.00a month
£0.00 upfront
£84.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

iD Mobile SIM Only on 5G 10GB (12 Month contract) with Unlimited mins…

iD Mobile
10 GBof 5G data
12 month contract
£7.00a month
£0.00 upfront
£84.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

iD Mobile SIM Only on 5G 5GB (12 Month contract) with Unlimited mins…

iD Mobile
5 GBof 5G data
12 month contract
£7.00a month
£0.00 upfront
£84.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

iD Mobile SIM Only on 5G 50GB (12 Month contract) with Unlimited mins…

iD Mobile
50 GBof 5G data
12 month contract
£8.00a month
£0.00 upfront
£96.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

iD Mobile SIM Only on 5G 60GB (12 Month contract) with Unlimited mins…

iD Mobile
60 GBof 5G data
12 month contract
£8.00a month
£0.00 upfront
£96.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

O2 SIM Only on Classic (12 Month contract) with Unlimited mins & texts…

O2
50 GBof 5G data
12 month contract
£8.00a month
£0.00 upfront
£96.00 total cost
  • No upfront cost
Buy now
at O2 MobilesDeal details

iD Mobile SIM Only on 5G 40GB (12 Month contract) with Unlimited mins…

iD Mobile
40 GBof 5G data
12 month contract
£8.00a month
£0.00 upfront
£96.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

iD Mobile SIM Only on 5G 40GB (12 Month contract) with Unlimited mins…

iD Mobile
40 GBof 5G data
12 month contract
£8.00a month
£0.00 upfront
£96.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

iD Mobile SIM Only on 5G 25GB (12 Month contract) with Unlimited mins…

iD Mobile
25 GBof 5G data
12 month contract
£8.00a month
£0.00 upfront
£96.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

iD Mobile SIM Only on 5G 20GB (12 Month contract) with Unlimited mins…

iD Mobile
20 GBof 5G data
12 month contract
£8.00a month
£0.00 upfront
£96.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

iD Mobile SIM Only on 5G 50GB (12 Month contract) with Unlimited mins…

iD Mobile
50 GBof 5G data
12 month contract
£8.00a month
£0.00 upfront
£96.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

iD Mobile SIM Only on 5G 30GB (12 Month contract) with Unlimited mins…

iD Mobile
30 GBof 5G data
12 month contract
£8.00a month
£0.00 upfront
£96.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

iD Mobile SIM Only on 5G 30GB (12 Month contract) with Unlimited mins…

iD Mobile
30 GBof 5G data
12 month contract
£8.00a month
£0.00 upfront
£96.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

Mozillion 30GB SIM, £8.50/mo, 12 months

Mozillion
30 GBof 5G data
12 month contract
£8.50a month
£102.00 upfrontEffective £17.00/mo
£204.00 total cost
  • NEW
Buy now
at MozillionDeal details

12 Month Plan 30GB

Lebara
30 GBof 5G data
12 month contract
£9.00a month
No mid-contract price rise£9.00 upfrontEffective £9.75/mo
£117.00 total cost
  • NEW
Buy now
at LebaraDeal details

Mozillion 150GB PAYG 12 months (£9/mo)

Mozillion
150 GBof 5G data
12 month contract
£9.00a month
£108.00 upfrontEffective £18.00/mo
£216.00 total cost
  • NEW
Buy now
at MozillionDeal details

Showing 24 of 80 deals

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.