SIM-only

Compare 5G SIM Only Deals UK | Best Plans | Switch

Compare 5G SIM Only Deals UK | Best Plans | Switch

Find the best 5G SIM only deals UK from EE, O2, Three, Vodafone and more. Compare monthly plans, unlimited data, and flexible contracts — free, fast, no hassle. Compare now with Switch.

List of deals (143)

143 deals · from 5 retailers · Updated 5h ago

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

Lebara 5GB SIM, £5/mo, 1-month rolling

Lebara
5 GBof 5G data
1 month contract
£5.00a month
No mid-contract price rise£5.00 upfront
£10.00 total cost
  • 1-month rolling
  • NEW
Buy now
at LebaraDeal details

giffgaff SIM Only on golden goodybag with Unlimited mins & texts…

giffgaff
2 GBof 5G data
No contract
£6.00a month
No mid-contract price rise£0.00 upfront
  • No upfront cost
  • No contract
Buy now
at giffgaffDeal details

giffgaff SIM Only on goodybag 1GB with Unlimited mins & texts…

giffgaff
1 GBof 5G data
No contract
£6.00a month
No mid-contract price rise£0.00 upfront
  • No upfront cost
  • No contract
Buy now
at giffgaffDeal details

iD Mobile SIM Only on 5G 25GB (1 Month contract) with Unlimited mins…

iD Mobile
25 GBof 5G data
1 month contract
£6.00a month
£0.00 upfront
£6.00 total cost
  • No upfront cost
  • 5G
  • 1-month rolling
Buy now
at iD MobileDeal 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

iD Mobile SIM Only on 5G 15GB (24 Month contract) with Unlimited mins…

iD Mobile
15 GBof 5G data
24 month contract
£6.00a month
£0.00 upfront
£144.00 total cost
  • No upfront cost
  • 5G
Buy now
at iD MobileDeal details

iD Mobile SIM Only on 5G 15GB (1 Month contract) with Unlimited mins…

iD Mobile
15 GBof 5G data
1 month contract
£6.00a month
£0.00 upfront
£6.00 total cost
  • No upfront cost
  • 5G
  • 1-month rolling
Buy now
at iD MobileDeal details

SIM Only 15GB

Lebara
15 GBof 5G data
1 month contract
£7.00a month
No mid-contract price rise£7.00 upfront
£14.00 total cost
  • 1-month rolling
  • NEW
Buy now
at LebaraDeal 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

O2 SIM Only on Classic (1 Month contract) with Unlimited mins & texts…

O2
10 GBof 5G data
1 month contract
£7.00a month
£0.00 upfront
£7.00 total cost
  • No upfront cost
  • 1-month rolling
Buy now
at O2 MobilesDeal 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 25GB (1 Month contract) with Unlimited mins…

iD Mobile
25 GBof 5G data
1 month contract
£7.00a month
£0.00 upfront
£7.00 total cost
  • No upfront cost
  • 5G
  • 1-month rolling
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

giffgaff SIM Only on golden goodybag with Unlimited mins & texts…

giffgaff
5 GBof 5G data
No contract
£8.00a month
No mid-contract price rise£0.00 upfront
  • No upfront cost
  • No contract
Buy now
at giffgaffDeal details

giffgaff SIM Only on goodybag 4GB with Unlimited mins & texts…

giffgaff
4 GBof 5G data
No contract
£8.00a month
No mid-contract price rise£0.00 upfront
  • No upfront cost
  • No contract
Buy now
at giffgaffDeal 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

giffgaff SIM Only on 40GB (18 Month contract) with Unlimited mins…

giffgaff
40 GBof 5G data
18 month contract
£8.00a month
No mid-contract price rise£0.00 upfront
£144.00 total cost
  • No upfront cost
Buy now
at giffgaffDeal details

O2 SIM Only on Classic (1 Month contract) with Unlimited mins & texts…

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

Showing 24 of 143 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.

Compare 5G SIM Only Deals UK | Best Plans | Switch: questions

Do I need a 5G phone?

Yes. Your phone must support 5G to use a 5G SIM. Most flagship phones from 2020 onward are 5G-enabled. Check your model’s specifications.

Does 5G use more data?