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
1 Month SIM Only Deals UK
Compare 1 month SIM only deals: no long-term commitment, cancel any time, no exit fees.
List of SIM-only deals (67)
67 deals · from 5 retailers · Updated 7h 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
Smarty 100GB SIM, £10/mo affiliate special, 1-month rolling
100GBof 5G data
100 GBof 5G data
£10.00a month
£10.00 upfront- 1-month rolling
- NEW
Buy nowat Smarty
at SmartyDeal 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
Showing 24 of 67 deals
What Is a 1 Month SIM Only Deal?
A 1 month SIM only deal, also called a rolling 30-day SIM, gives you a monthly allowance of data, calls, and texts without locking you into a 12 or 24 month contract. There is no phone included, so you keep the handset you already have. Your plan rolls over each month automatically, and you can cancel or switch with just 30 days notice.
This makes it completely different from a standard pay monthly contract, where you are tied in for up to two years and face exit fees if you leave early.
- You already have a phone and just need data, calls, and texts
- You are waiting to upgrade and don't want to be stuck in a contract
- Your circumstances might change: new job, travel, or moving abroad
- You want to try a new network before committing to a longer deal
- You have a lower credit score and want to avoid stricter checks
- You are a student or on variable income who needs to control spending
1 Month vs 12 Month SIM Only: Which Is Better?
← Swipe to see all columns →
If saving every penny matters most and you are happy to commit, a 12-month plan often costs less per month. But if flexibility is your priority, the small extra cost of a 1 month sim only uk deal is well worth it.
How Much Data Do You Actually Need?
← Swipe to see all columns →
According to Ofcom, the average UK mobile user consumes around 8GB of data per month. If you are often on Wi-Fi at home or work, you may need far less. Switch lets you filter deals by data allowance, so you only compare what suits your usage.
Top Networks for 1 Month SIM Only Deals in the UK
1
Three
Three is consistently ranked as the UK's fastest 5G network. All SIM plans come with access to Three+ rewards, a customer loyalty app offering exclusive deals and pre-sale event tickets. Three offers 30-day rolling plans with data options from a few GB up to Unlimited, all with unlimited calls and texts as standard.
2
O2
O2 is the only major UK network that still includes EU roaming in its SIM plans, a significant advantage for frequent travellers. O2 Priority gives you access to exclusive deals, restaurant offers, and event pre-sales every week. O2 rolling SIM plans are available across a range of data allowances.
3
Vodafone
Vodafone offers a wide range of 1-month rolling plans, including Vodafone Basics: affordable plans with 4G data and unlimited UK calls and texts at a lower price point. Vodafone's 5G network is one of the broadest in the UK and all pay monthly plans include 5G access as standard.
4
SMARTY
SMARTY is a budget-friendly network running on Three's infrastructure, which means you get Three's coverage and 5G speeds at a lower monthly price. SMARTY plans are all 30-day rolling with no mid-contract price rises, making it a strong pick for cost-conscious users who still want solid coverage.
5
iD Mobile
iD Mobile offers competitive 1-month SIM deals with data rollover: unused data carries over to the next month rather than being wasted. iD Mobile plans have no annual price rises, roaming in 50 destinations, and are regularly among the cheapest options on the market.
6
Lebara and Lyca Mobile
Both Lebara and Lyca Mobile run on Vodafone's network and are excellent choices for budget users, especially those who make regular international calls. Plans start from as little as £1 to 2 per month for low-data options, with no credit check required on many rolling plans.
How to Get a 1 Month SIM Only Deal Through Switch
Five simple steps to your new flexible plan.
1
Compare Deals
Enter your data needs and preferred network on Switch. See every available 1 month SIM only plan ranked by monthly cost, no sign-up needed.
2
Choose Your Plan
Pick the deal that matches your budget and usage. Filter by network, data allowance, 5G availability, or extras like EU roaming.
3
Keep Your Number
Text PAC to 65075 for free from your current number. Your PAC code arrives by text immediately. Give it to your new network when signing up.
4
Receive Your SIM
Standard physical SIMs arrive in 2 to 3 working days. eSIMs are sent instantly by email and activated in your phone settings in minutes.
5
Cancel Any Time
Give 30 days notice when you are ready to move on. No exit fees, no hassle. Your number is yours to take wherever you go.
Do You Need a Credit Check for a 1 Month SIM?
One big advantage of a rolling 30-day plan is that credit checks are usually much lighter than for a 12 or 24 month contract. Because the network is not committing to a long-term relationship or trusting you with an expensive handset, the financial risk is lower.
Some networks, including Lebara, Lyca Mobile, and SMARTY, offer certain rolling plans with minimal or no credit checks. If you have had credit issues in the past, a 1 month sim only uk plan is often much easier to be accepted for than a standard pay monthly deal.
If you would prefer to avoid any credit check entirely, a Pay As You Go SIM is the alternative: you top up as you go with no ongoing commitment.
Can I Get a 1 Month SIM as an eSIM?
Yes. Most major networks now offer eSIM versions of their 1-month rolling plans. An eSIM is a digital SIM that is activated directly on your phone, no physical card is needed. Your new SIM details are sent by email and you activate them in your phone settings in minutes.
eSIMs are supported by most modern smartphones, including all iPhones from iPhone XS onwards, and most recent Android handsets from Samsung, Google Pixel, and others. When comparing plans on Switch, look for the eSIM label if this is important to you.
Which 1 Month SIM Deals Include EU Roaming?
EU roaming is no longer included automatically by most UK networks following Brexit. However, several networks do still include it on certain plans:
← Swipe to see all columns →
If you travel to Europe regularly, Switch lets you filter by plans that include EU roaming so you can compare your options directly.
Compare 1 Month SIM Only Deals Now: It Takes 2 Minutes
Switch brings together every 1 month SIM only uk deal in one place. No hidden rankings, no bias toward any single network, just clear, up-to-date comparisons so you can pick the plan that works for you.
Keep your phone. Keep your number. Cancel any time.
Free AI deals helper
Meet Squid AI, your free deals agent
Say how much data you use and Squid AI picks the cheapest SIM that fits.
No sign-up · answers in seconds
- Save moneyKeep your phone and stop overpaying for data.
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- Cheapest SIMSearches live SIM-only prices on every network.
FAQs
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 to 2 per month for small data allowances. Switch shows live pricing so you always see the current cheapest option for your data needs.
Can I keep my phone number on a 1 month SIM only plan?
Will a 1 month SIM work in my phone?
Is there a difference between a 1 month SIM and Pay As You Go?
Can I upgrade from a 1 month SIM to a longer deal?
Do 1 month SIM plans include 5G?
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