Mozillion 3GB SIM, £4.50/mo, 1-month rolling
3GBof 5G data
3 GBof 5G data
£4.50a month
£4.50 upfront- 1-month rolling
- NEW
Buy nowat Mozillion
at MozillionDeal details
SIM-only
Compare 1-month SIM-only deals
A 1-month rolling SIM gives you maximum flexibility: no 12- or 24-month commitment, just a monthly allowance you can cancel anytime.
List of deals (67)
67 deals · from 5 retailers · Updated 4h ago
1 month contract
£9.00 total cost
Lebara 5GB SIM, £5/mo, 1-month rolling
5GBof 5G data
5 GBof 5G data
£5.00a month
No mid-contract price rise£5.00 upfront- 1-month rolling
- NEW
Buy nowat Lebara
at LebaraDeal details
Mozillion 10GB SIM, £5.90/mo, 1-month rolling
10GBof 5G data
10 GBof 5G data
£5.90a month
£5.90 upfront- 1-month rolling
- NEW
Buy nowat Mozillion
at MozillionDeal details
iD Mobile SIM Only on 5G 25GB (1 Month contract) with Unlimited mins…
25GBof 5G data
25 GBof 5G data
£6.00a month
£0.00 upfront- No upfront cost
- 5G
- 1-month rolling
Buy nowat iD Mobile
at iD MobileDeal details
Smarty 18GB SIM, £6/mo with affiliate voucher, 1-month rolling
18GBof 5G data
18 GBof 5G data
£6.00a month
£6.00 upfront- 1-month rolling
- NEW
Buy nowat Smarty
at SmartyDeal details
iD Mobile SIM Only on 5G 15GB (1 Month contract) with Unlimited mins…
15GBof 5G data
15 GBof 5G data
£6.00a month
£0.00 upfront- No upfront cost
- 5G
- 1-month rolling
Buy nowat iD Mobile
at iD MobileDeal details
SIM Only 15GB
15GBof 5G data
15 GBof 5G data
£7.00a month
No mid-contract price rise£7.00 upfront- 1-month rolling
- NEW
Buy nowat Lebara
at LebaraDeal details
O2 SIM Only on Classic (1 Month contract) with Unlimited mins & texts…
10GBof 5G data
10 GBof 5G data
£7.00a month
£0.00 upfront- No upfront cost
- 1-month rolling
Buy nowat O2 Mobiles
at O2 MobilesDeal details
Smarty 40GB SIM, £7/mo with affiliate voucher, 1-month rolling
40GBof 5G data
40 GBof 5G data
£7.00a month
£7.00 upfront- 1-month rolling
- NEW
Buy nowat Smarty
at SmartyDeal details
iD Mobile SIM Only on 5G 25GB (1 Month contract) with Unlimited mins…
25GBof 5G data
25 GBof 5G data
£7.00a month
£0.00 upfront- No upfront cost
- 5G
- 1-month rolling
Buy nowat iD Mobile
at iD MobileDeal details
Mozillion 30GB SIM, £7.90/mo, 1-month rolling
30GBof 5G data
30 GBof 5G data
£7.90a month
£7.90 upfront- 1-month rolling
- NEW
Buy nowat Mozillion
at MozillionDeal details
SIM Only 30GB
30GBof 5G data
30 GBof 5G data
£8.00a month
No mid-contract price rise£8.00 upfront- 1-month rolling
- NEW
Buy nowat Lebara
at LebaraDeal details
O2 SIM Only on Classic (1 Month contract) with Unlimited mins & texts…
50GBof 5G data
50 GBof 5G data
£8.00a month
£0.00 upfront- No upfront cost
- 1-month rolling
Buy nowat O2 Mobiles
at O2 MobilesDeal details
Asda Mobile 10GB SIM £8 (1-month plan)
10GBof 5G data
10 GBof 5G data
£8.00a month
£8.00 upfront- 1-month rolling
- NEW
Buy nowat Asda Mobile
at Asda MobileDeal details
Smarty 50GB SIM, £8/mo, 1-month rolling
50GBof 5G data
50 GBof 5G data
£8.00a month
£8.00 upfront- 1-month rolling
- NEW
Buy nowat Smarty
at SmartyDeal details
SIM Only 50GB
50GBof 5G data
50 GBof 5G data
£9.00a month
No mid-contract price rise£9.00 upfront- 1-month rolling
- NEW
Buy nowat Lebara
at LebaraDeal details
iD Mobile SIM Only on 5G 108GB (1 Month contract) with Unlimited mins…
108GBof 5G data
108 GBof 5G data
£9.00a month
£0.00 upfront- No upfront cost
- 5G
- 1-month rolling
Buy nowat iD Mobile
at iD MobileDeal details
95GB
95GBof 5G data
95 GBof 5G data
£9.00a month
£9.00 upfront- 1-month rolling
- NEW
Buy nowat Smarty
at SmartyDeal details
Mozillion Thailand eSIM 10GB, 7 days, £9
10GBof 5G data
10 GBof 5G data
£9.00a month
£0.00 upfront- No upfront cost
- 1-month rolling
Mozillion 80GB SIM, £9.90/mo, 1-month rolling
80GBof 5G data
80 GBof 5G data
£9.90a month
£9.90 upfront- 1-month rolling
- NEW
Buy nowat Mozillion
at MozillionDeal details
SIM Only 30GB
30GBof 5G data
30 GBof 5G data
£10.00a month
No mid-contract price rise£10.00 upfront- 1-month rolling
- NEW
Buy nowat Lebara
at LebaraDeal details
iD Mobile SIM Only on 5G 110GB (1 Month contract) with Unlimited mins…
110GBof 5G data
110 GBof 5G data
£10.00a month
£0.00 upfront- No upfront cost
- 5G
- 1-month rolling
Buy nowat iD Mobile
at iD MobileDeal details
O2 SIM Only on Classic (1 Month contract) with Unlimited mins & texts…
80GBof 5G data
80 GBof 5G data
£10.00a month
£0.00 upfront- No upfront cost
- 1-month rolling
Buy nowat O2 Mobiles
at O2 MobilesDeal details
Lyca 30GB SIM, £5 first month then £10/mo, 1-month rolling
30GBof 5G data
30 GBof 5G data
£10.00a month
£5.00 upfront- 1-month rolling
- NEW
Buy nowat Lyca Mobile
at Lyca MobileDeal details
Showing 24 of 67 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.
Frequently asked questions
What is the cheapest 1 month SIM only deal in the UK?
Prices change regularly, but budget networks like Lebara and Lyca Mobile regularly offer rolling 30-day plans from as little as £1–2 per month for small data allowances. Switch shows live pricing so you always see the current cheapest option for your data needs.