SIM

SIM Only deals

SIM card

Compare every SIM-only deal across the UK's major networks and MVNOs. No phone bundled. Keep the handset you have and just pay for what you actually use.

Top 3 best-value SIM-only deals

  1. 1. Sky Mobile SIM Only on Unlimited Calls and Texts 3GB (24 Month contract) with Unlimited mins & texts; 3GB of 5G data. £3 a month · Sky

    £3.00/mo

    No upfront cost · 24-month

    Buy nowDetails

  2. 2. 24 month SIM only contract - Unlimited Minutes & Texts plus 3GB Data · Asda Mobile

    £5.00/mo

    + £5.00 upfront · 24-month

    Buy nowDetails

  3. 3. 12 month SIM only contract - Unlimited Minutes & Texts plus 3GB Data · Asda Mobile

    £5.00/mo

    + £5.00 upfront · 12-month

    Buy nowDetails

In Best value order (the monthly price plus any upfront cost spread over the contract). Prices are the monthly price the retailer lists.

List of SIM-only deals (355)

355 deals · from 8 retailers · Updated 5h ago

Sky Mobile SIM Only on Unlimited Calls and Texts 3GB (24 Month contract) with Unlimited mins & texts; 3GB of 5G data. £3 a month

Sky Mobile logo
3 GBof 5G data
24 monthscontract
£3.00a month
No upfront cost£3 a month on a 24-month contract, with price rises each year
Buy now
at SkyDeal details
  • 5G

24 month SIM only contract - Unlimited Minutes & Texts plus 3GB Data

Asda Mobile logo
3 GBof 5G data
24 monthscontract
£5.00a month
£5.00 upfront
Buy now
at Asda MobileDeal details
  • NEW

12 month SIM only contract - Unlimited Minutes & Texts plus 3GB Data

Asda Mobile logo
3 GBof 5G data
12 monthscontract
£5.00a month
£5.00 upfront
Buy now
at Asda MobileDeal details
  • NEW

Mozillion 1GB SIM Only, 12-month

Mozillion logo
1 GBof 5G data
12 monthscontract
£2.75a month
£33.00 upfront
Buy now
at MozillionDeal details
  • NEW

giffgaff SIM Only on golden goodybag with Unlimited mins & texts; 2GB of 5G data. £6 Topup

giffgaff logo
2 GBof 5G data
Rollingno contract
£6.00a month
No upfront costNo mid-contract price rise
Buy now
at giffgaffDeal details
  • 5G
  • No contract

giffgaff SIM Only on goodybag 1GB with Unlimited mins & texts; 1GB of 5G data. £6 Topup

giffgaff logo
1 GBof 5G data
Rollingno contract
£6.00a month
No upfront costNo mid-contract price rise
Buy now
at giffgaffDeal details
  • 5G
  • No contract

iD Mobile SIM Only on 5G 25GB (1 Month contract) with Unlimited mins & texts; 25GB of 5G data. £6 a month

iD Mobile logo
25 GBof 5G data
1 monthcontract
£6.00a month
No upfront cost
Buy now
at Mobiles.co.ukDeal details
  • 5G
  • 1-month rolling

10GB Upgrade SIM Only Deal – ID Mobile – 1 Months - £6.00/Month

iD Mobile logo
10 GBof 5G data
1 monthcontract
£6.00a month
No upfront cost
Buy now
at Mobiles.co.ukDeal details
  • 1-month rolling
  • new

25GB SIM Only Deal – ID Mobile – 1 Months - £6.00/Month

iD Mobile logo
25 GBof 5G data
1 monthcontract
£6.00a month
No upfront cost
Buy now
at Mobiles.co.ukDeal details
  • 1-month rolling
  • new

iD Mobile SIM Only on 5G 20GB (12 Month contract) with Unlimited mins & texts; 20GB of 5G data. £6 a month

iD Mobile logo
20 GBof 5G data
12 monthscontract
£6.00a month
No upfront cost
Buy now
at Mobiles.co.ukDeal details
  • 5G

5GB Upgrade SIM Only Deal – ID Mobile – 12 Months - £6.00/Month

iD Mobile logo
5 GBof 5G data
12 monthscontract
£6.00a month
No upfront cost
Buy now
at Mobiles.co.ukDeal details
  • new

20GB SIM Only Deal – ID Mobile – 12 Months - £6.00/Month

iD Mobile logo
20 GBof 5G data
12 monthscontract
£6.00a month
No upfront cost
Buy now
at Mobiles.co.ukDeal details
  • new

iD Mobile SIM Only on 5G 20GB (24 Month contract) with Unlimited mins & texts; 20GB of 5G data. £6 a month

iD Mobile logo
20 GBof 5G data
24 monthscontract
£6.00a month
No upfront cost
Buy now
at iD MobileDeal details
  • 5G

iD Mobile SIM Only on 5G 15GB (24 Month contract) with Unlimited mins & texts; 15GB of 5G data. £6 a month

iD Mobile logo
15 GBof 5G data
24 monthscontract
£6.00a month
No upfront cost
Buy now
at iD MobileDeal details
  • 5G

iD Mobile SIM Only on 5G 20GB (24 Month contract) with Unlimited mins & texts; 20GB of 5G data. £6 a month

iD Mobile logo
20 GBof 5G data
24 monthscontract
£6.00a month
No upfront cost
Buy now
at Mobiles.co.ukDeal details
  • 5G

6GB Upgrade SIM Only Deal – ID Mobile – 24 Months - £6.00/Month

iD Mobile logo
6 GBof 5G data
24 monthscontract
£6.00a month
No upfront cost
Buy now
at Mobiles.co.ukDeal details
  • new

20GB SIM Only Deal – ID Mobile – 24 Months - £6.00/Month

iD Mobile logo
20 GBof 5G data
24 monthscontract
£6.00a month
No upfront cost
Buy now
at Mobiles.co.ukDeal details
  • new

Sky Mobile SIM Only on Unlimited Calls and Texts 10GB (24 Month contract) with Unlimited mins & texts…

Sky Mobile logo
10 GBof 5G data
24 monthscontract
£6.00a month
No upfront cost£6 a month on a 24-month contract, with price rises each year
Buy now
at SkyDeal details

Network offer: Affiliate exclusive 10GB £6 — until 18 Nov 2026

Mozillion 80GB SIM Only, 24-month

Mozillion logo
80 GBof 5G data
24 monthscontract
£3.00a month
£75.00 upfront
Buy now
at MozillionDeal details
  • NEW

24 month SIM only contract - Unlimited Minutes & Texts plus 10GB Data

Asda Mobile logo
10 GBof 5G data
24 monthscontract
£5.95a month
£5.95 upfront
Buy now
at Asda MobileDeal details
  • NEW

12 month SIM only contract - Unlimited Minutes & Texts plus 10GB Data

Asda Mobile logo
10 GBof 5G data
12 monthscontract
£5.95a month
£5.95 upfront
Buy now
at Asda MobileDeal details
  • NEW

O2 SIM Only on Classic (1 Month contract) with Unlimited mins & texts; 10GB of 5G data. £7 a month (Consumer - Affiliate Price)

O2 logo
10 GBof 5G data
1 monthcontract
£7.00a month
No upfront cost
Buy now
at O2 MobilesDeal details
  • 5G
  • 1-month rolling

iD Mobile SIM Only on 5G 50GB (1 Month contract) with Unlimited mins & texts; 50GB of 5G data. £7 a month

iD Mobile logo
50 GBof 5G data
1 monthcontract
£7.00a month
No upfront cost
Buy now
at Mobiles.co.ukDeal details
  • 5G
  • 1-month rolling

20GB Upgrade SIM Only Deal – ID Mobile – 1 Months - £7.00/Month

iD Mobile logo
20 GBof 5G data
1 monthcontract
£7.00a month
No upfront cost
Buy now
at Mobiles.co.ukDeal details
  • 1-month rolling
  • new

Showing 24 of 355 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.

The big four UK carriers

EE SIM-only deals→O2 SIM-only deals→Vodafone SIM-only deals→Three SIM-only deals→giffgaff SIM-only deals→

Every UK network we cover

O2 SIM-only plans→giffgaff SIM-only plans→iD Mobile SIM-only plans→Lebara SIM-only plans→Vodafone SIM-only plans→Three SIM-only plans→Tesco Mobile SIM-only plans→Talkmobile SIM-only plans→Sky Mobile SIM-only plans→EE SIM-only plans→VOXI SIM-only plans→SMARTY SIM-only plans→Spusu Mobile SIM-only plans→Honest Mobile SIM-only plans→Virgin Media SIM-only plans→

Compare SIM plans by type

Compare 5G SIM-only deals→Compare unlimited data SIM-only deals→Compare cheap SIM-only deals→Compare eSIM deals→Compare 1-month SIM-only deals→Compare 12-month SIM-only deals→

Compare SIM-only deals — questions

What is a SIM-only deal?

A SIM-only deal provides just a SIM card with a monthly allowance of minutes, texts and data, without a new handset. Contracts can be 1-month rolling, 12 months or 24 months.

Can I keep my phone number?