Compare 30-day SIM-only deals

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texts
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4GB
of 4G data
1
month contract
£6.00
per month
  • Extra 2GB for existing Broadband customers
  • Roam like at home
  • Free delivery
  • 14 day returns policy
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12GB
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1
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£8.00
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  • Extra 2GB for existing Broadband customers
  • Roam like at home
  • Free delivery
  • 14 day returns policy
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Unltd
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20GB
of 4G data
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£10.00
per month
  • Extra 2GB for existing Broadband customers
  • Roam like at home
  • Free delivery
  • 14 day returns policy

Compare 30-day SIM-only deals

30 day SIM deals icon

30-day SIM plans are perfect when you only need a mobile deal for a short time - whether you're saving up for a new phone, waiting for a new flagship phone release, or if you're only in the country for a short while.

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Best 30 day SIM only deals this week

Provider Data Amount Contract Length Monthly Costs
VOXI sim only 15GB data 1 month £10.00
ID sim only 40GB data 1 month £15.00
Lebara Mobile sim only 7GB data 1 month £6.99
Plusnet Mobile sim only 12GB data 1 month £8.00
ID sim only 24GB data 1 month £10.00
GiffGaff sim only 10GB data 1 month £10.00
  • VOXI sim only
    5G
    • 15GB of 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • Unlimited social data
    • £10.00 per month
    1 month contract From VOXI
  • ID sim only
    5G
    • 40GB of 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • Up to 5 months free Apple Music
    • £15.00 per month
    1 month contract From iD Mobile
  • Lebara Mobile sim only
    5G
    • 7GB of 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • 100 international minutes to over 40 countries
    • £6.99 per month
    1 month contract From Lebara Mobile
  • Plusnet Mobile sim only
    4G
    • 12GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • Extra 2GB for existing Broadband customers
    • £8.00 per month
    1 month contract From Plusnet Mobile
  • ID sim only
    5G
    • 24GB of 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • Up to 5 months free Apple Music
    • £10.00 per month
    1 month contract From iD Mobile
  • GiffGaff sim only
    5G
    • 10GB of 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • £10.00 per month
    1 month contract From giffgaff

What does '30 day SIM only deals' mean?

The term '30-day SIM only deals' refers to flexible, rolling-contract SIMs that you're free to leave with just with 30 days' notice. They also afford you to the option to upgrade or downgrade your allowance just as easily.

Other than that, 30 day SIM only deals operate just like 12-month SIM contracts, in the respect that you pay a monthly charge by direct debit in return for a pre-determined allowance of calls, data and texts.

How do 30-day SIMs work?

You can put 30-day SIMs in any mobile phone you want, so long as the phone is unlocked and you get the correct size SIM card.

They're almost always rolling contracts. So they renew automatically every month until you want to cancel. Just remember to end your plan when you're ready to move on.

Which networks offer 30-day SIM-only deals?

You aren't short on choice for rolling one-month SIMs. Lots of networks offer this kind of plan. They include…

giffgaff 30-day SIM only deals

Giffgaff is technically a pay-as-you-go network, but allows you to buy 30-day 'goodybags' of allowances. You also get inclusive roaming in the EU and coverage courtesy of O2.

Provider Data Amount Contract Length Monthly Costs
GiffGaff sim only 10GB data 1 month £10.00
GiffGaff sim only 25GB data 1 month £15.00
GiffGaff sim only 100GB data 1 month £20.00
  • GiffGaff sim only
    5G
    • 10GB of 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • £10.00 per month
    1 month contract From giffgaff
  • GiffGaff sim only
    4G
    • 25GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • £15.00 per month
    1 month contract From giffgaff
  • GiffGaff sim only
    4G
    • 100GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • £20.00 per month
    1 month contract From giffgaff

iD Mobile 30-day SIM only deals

Carphone Warehouse's subsidiary iD Mobile's plans are affordable and offer inclusive roaming in 50 locations, as well as coverage in line with O2.

Provider Data Amount Contract Length Monthly Costs
ID sim only 8GB data 1 month £7.00
ID sim only 12GB data 1 month £8.00
ID sim only 100GB data 1 month £17.00
  • ID sim only
    5G
    • 8GB of 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • Up to 5 months free Apple Music
    • £7.00 per month
    1 month contract From iD Mobile
  • ID sim only
    5G
    • 12GB of 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • Up to 5 months free Apple Music
    • £8.00 per month
    1 month contract From iD Mobile
  • ID sim only
    5G
    • 100GB of 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • Up to 5 months free Apple Music
    • £17.00 per month
    1 month contract From iD Mobile

Plusnet Mobile 30-day SIM-only deals

Plusnet Mobile offers value plans, and extra discounts for Plusnet broadband customers.

Provider Data Amount Contract Length Monthly Costs
Plusnet Mobile sim only 4GB data 1 month £6.00
Plusnet Mobile sim only 12GB data 1 month £8.00
Plusnet Mobile sim only 20GB data 1 month £10.00
  • Plusnet Mobile sim only
    4G
    • 4GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • Extra 2GB for existing Broadband customers
    • £6.00 per month
    1 month contract From Plusnet Mobile
  • Plusnet Mobile sim only
    4G
    • 12GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • Extra 2GB for existing Broadband customers
    • £8.00 per month
    1 month contract From Plusnet Mobile
  • Plusnet Mobile sim only
    4G
    • 20GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • Extra 2GB for existing Broadband customers
    • £10.00 per month
    1 month contract From Plusnet Mobile

Smarty 30-day SIM-only deals

Smarty offers some excellent value plans, which are flexible and get you money back for unused data. And you can use your plan for tethering too.

Provider Data Amount Contract Length Monthly Costs
SMARTY sim only 4GB data 1 month £3.00
SMARTY sim only 8GB data 1 month £3.50
SMARTY sim only Unlimited data 1 month £16.00
  • SMARTY sim only
    4G
    • Exclusive
    • 4GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • First 3 months half price
    • £3.00 per month
    1 month contract From SMARTY
  • SMARTY sim only
    4G
    • Exclusive
    • 8GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • First 3 months half price
    • £3.50 per month
    1 month contract From SMARTY
  • SMARTY sim only
    4G
    • Unlimited 4G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • No speed caps
    • £16.00 per month
    1 month contract From SMARTY

Three 30-day SIM-only deals

Three has a wide array of 30-day SIM tariffs. It's also notable for its wide-ranging inclusive roaming scheme and allows you to use your phone for tethering.

Provider Data Amount Contract Length Monthly Costs
Three sim only Unlimited data 1 month £24.00
Three sim only Unlimited data 1 month £24.00
Three sim only Unlimited data 1 month £24.00
  • Three sim only
    5G
    • Unlimited 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • £24.00 per month
    1 month contract From Three Mobile
  • Three sim only
    5G
    • Unlimited 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • £24.00 per month
    1 month contract From Three Mobile
  • Three sim only
    5G
    • Unlimited 5G data
    • Unlimited minutes
    • Unlimited texts
    • download speed limit
    • £24.00 per month
    1 month contract From Three Mobile

Vodafone 30-day SIM-only deals

You can expect lots of choice, reliable service, and free extras thrown in on Vodafone Red plans.

Some plans offer inclusive roaming in up 81 locations, as well as a three-month free trial of SecureNet security software.

Pros and cons of 30-day SIM only deals

The good...

  • They're flexible - you can change or cancel a plan whenever you want
  • Ideal for short-term use if you only need a plan for a short while
  • There's loads of choice of tariffs from lots of networks
  • 30-day SIM plans without a credit check are available

The less good...

  • Usually more expensive per month than 12-month or 24-month SIM deals
  • You need to buy or already own a phone
  • Switching networks for only a short time can be hassle

What to look for in 30-day SIM-only deal

The best and easiest way to find a good value 30-day SIM is to use our mobile deal comparison tables at the top of this page:

  • We'll show you a range of SIM plans from all corners of the mobile market, including major networks as well as smaller ones, so you can compare all the available options.
  • To find 30-day SIM deals, just select the 'one-month' contract length from the toggle at the side of the page.
  • You can filter by anything else you want to as well, such as budget, network, and monthly allowance - and sort the results by cost to see the cheapest deals first. Then simply click on one you like, and we'll take you straight to the provider to sign up.

Cheapest 30-day SIM deals

The most wallet-friendly 30-day SIM plans from household-name networks start at around £5 per month. But if don't mind going with a lesser known network, for example Lebara, you can sometimes get a one-month SIM plan even cheaper.

30-day SIMs with freebies

Choosing 30-day SIMs doesn't mean you miss out on customer rewards. For instance, O2 customers on 30-day plans are still enrolled in its Rewards and Priority schemes.

The same goes for Vodafone, which extends its VeryMe incentives to 30-day SIM customers too.

30-day SIMs with a good data allowance

The average Briton gets through around 3GB of mobile data per month. So most of you will be fine with a relatively low data allowance.

However, if you're not sure how much data you use you can check by opening your network's app on your smartphone.

Alternatives to 30-day SIMs

Frequently asked questions

Do SIM cards expire if not used?

Yes, but the length of time that unused SIM will stay active depends on which network you're with. Most household-name networks will keep a SIM active so long as you've topped up once or made a single chargeable call over the last six months.

However, less well known, smaller networks generally aren't so generous and some cancel SIMs if there's no activity on the SIM for just three months or so.

Do I have to top up 30-day SIMs every month?

No, on 30-day rolling SIMs your monthly allowances will automatically renew every 30 days and a the payment will be taken from your account by direct debit. So there's no need to top up.