Compare 30-day SIM-only deals

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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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You can put them in any mobile phone you want, so long as it's unlocked and you get the correct size SIM card. As well as that, they're almost always rolling contracts - they renew automatically every month until you want to cancel. Just remember to end your plan when you're ready to move on.

Best 30 day SIM only deals this week

Provider Data Amount Contract Length Monthly Costs
GiffGaff sim only 80GB data 1 month £20.00
SMARTY sim only 30GB data 1 month £10.00
  • GiffGaff sim only
    • 80GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • £20.00 per month
    1 month contract From giffgaff
  • SMARTY sim only
    • 30GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • £10.00 per month
    1 month contract From SMARTY

What does '30 day SIM only' mean?

30-day SIM only refers to flexible, rolling-contract SIM deals 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 to choose a 30-day SIM-only deal

Easy - use our mobile deal comparison tool:

  • We'll show you tons 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 '1 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.

Networks that offer 30-day SIM-only deals

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


Giffgaff logo

Also technically a pay-as-you-go network, but again you can buy 30-day 'goodybags' of allowances.

iD Mobile

iD Mobile

Carphone Warehouse's network, famed for its cheap-as-chips plans.

Plusnet Mobile

Plusnet Mobile logo

Offers value plans, and extra discounts on top of that for Plusnet broadband customers.


Smarty logo

Smarty offers some excellent value plans if you don’t need a big data allowance.


Three logo

Has a huge spread of tariffs to choose from, and you can even get unlimited data.


Vodafone logo

Lots of choice, reliable service, and free extras thrown in on Vodafone Red plans.

Pay-as-you-go SIM-only deals

If a long-term mobile contract doesn't appeal, you can always go for a Pay As You Go (PAYG) SIM deal - a great option if you want to keep your old handset.

Frequently asked questions

What's good about 30-day SIM-only deals?

  • 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

What's bad about 30-day SIM-only deals?

  • 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

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.