Compare 30-day SIM-only deals

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EXCLUSIVE
Unltd
texts
Unltd
minutes
12GB
of 4G data
1
month contract
£10.00
per month
  • Includes a £10 Amazon Gift Card
  • Unlimited social data
  • Free delivery
  • 14 day returns policy
OUR PICK
Unltd
texts
Unltd
minutes
15GB
of 4G data
1
month contract
£15.00
per month
  • Free delivery
  • 14 day returns policy
OUR PICK
Unltd
texts
Unltd
minutes
30GB
of 4G data
1
month contract
£10.00
per month
  • Free delivery
OUR PICK
Unltd
texts
Unltd
minutes
10GB
of 4G data
1
month contract
£8.00
per month
  • Roam like at home
  • Free delivery
  • 14 day returns policy
EXCLUSIVE
Unltd
texts
Unltd
minutes
45GB
of 5G data
1
month contract
£20.00
per month
  • Includes a £20 Amazon Gift Card
  • Unlimited social data
  • Free delivery
  • 14 day returns policy
Unltd
texts
Unltd
minutes
12GB
of 4G data
1
month contract
£8.00
per month
  • Free Data Rollover
  • EU Roaming
  • Free delivery
  • 30 day returns policy
EXCLUSIVE
Unltd
texts
Unltd
minutes
5GB
of 4G data
1
month contract
£3.49
per month
  • 100 international minutes to over 40 countries
  • No credit checks required
  • Free delivery
  • 14 day returns policy
Unltd
texts
Unltd
minutes
10GB
of 4G data
1
month contract
£5.00
per month
  • 100 international minutes to over 40 countries
  • No credit checks required
  • Free delivery
  • 14 day returns policy
Unltd
texts
200
minutes
500MB
of 4G data
1
month contract
£1.99
per month
  • 50 international minutes to over 40 countries
  • No credit checks required
  • Free delivery
  • 14 day returns policy
Unltd
texts
1000
minutes
2GB
of 4G data
1
month contract
£2.49
per month
  • 100 international minutes to over 40 countries
  • No credit checks required
  • Free delivery
  • 14 day returns policy
EXCLUSIVE
Unltd
texts
Unltd
minutes
3GB
of 4G data
1
month contract
£2.99
per month
  • 100 international minutes to over 40 countries
  • No credit checks required
  • Free delivery
  • 14 day returns policy
EXCLUSIVE
Unltd
texts
Unltd
minutes
7GB
of 4G data
1
month contract
£3.99
per month
  • 100 international minutes to over 40 countries
  • No credit checks required
  • Free delivery
  • 14 day returns policy
Unltd
texts
Unltd
minutes
2GB
of 4G data
1
month contract
£4.95
per month
  • Free delivery
  • 14 day returns policy
EXCLUSIVE
Unltd
texts
Unltd
minutes
2GB
of 4G data
1
month contract
£5.00
per month
  • Free delivery
Unltd
texts
Unltd
minutes
1GB
of 4G data
1
month contract
£5.00
per month
  • Free delivery
  • 14 day returns policy
EXCLUSIVE
Unltd
texts
Unltd
minutes
1GB
of 4G data
1
month contract
£5.00
per month
  • Free Data Rollover
  • EU Roaming
  • Free delivery
  • 30 day returns policy
Unltd
texts
Unltd
minutes
4GB
of 4G data
1
month contract
£6.00
per month
  • Free Data Rollover
  • EU Roaming
  • Free delivery
  • 30 day returns policy
Unltd
texts
Unltd
minutes
3GB
of 4G data
1
month contract
£6.00
per month
  • 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.

Compare deals

Best 30 day SIM only deals this week

Provider Data Amount Contract Length Monthly Costs
VOXI sim only 12GB data 1 month £10.00
SMARTY sim only 30GB data 1 month £10.00
Lebara Mobile sim only 5GB data 1 month £3.49
Plusnet Mobile sim only 10GB data 1 month £8.00
ID sim only 12GB data 1 month £8.00
GiffGaff sim only 6GB data 1 month £10.00
  • VOXI sim only
    4G
    • Exclusive
    • 12GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • Includes a £10 Amazon Gift Card
    • £10.00 per month
    1 month contract From VOXI
  • SMARTY sim only
    4G
    • 30GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • £10.00 per month
    1 month contract From SMARTY
  • Lebara Mobile sim only
    4G
    • Exclusive
    • 5GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • 100 international minutes to over 40 countries
    • £3.49 per month
    1 month contract From Lebara Mobile
  • Plusnet Mobile sim only
    4G
    • 10GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • Roam like at home
    • £8.00 per month
    1 month contract From Plusnet Mobile
  • ID sim only
    4G
    • 12GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • Free Data Rollover
    • £8.00 per month
    1 month contract From iD Mobile
  • GiffGaff sim only
    4G
    • 6GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • £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 15GB data 1 month £15.00
GiffGaff sim only Unlimited data 1 month £25.00
  • GiffGaff sim only
    4G
    • 15GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • £15.00 per month
    1 month contract From giffgaff
  • GiffGaff sim only
    4G
    • Unlimited 4G data
    • Unlimited minutes
    • Unlimited texts
    • Speed restrictions apply after 40GB of data use
    • £25.00 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 12GB data 12 months £10.00
ID sim only 50GB data 12 months £15.00
ID sim only 100GB data 12 months £18.00
  • ID sim only
    4G
    • 12GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • Free Data Rollover
    • £10.00 per month
    12 month contract From iD Mobile
  • ID sim only
    4G
    • 50GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • Free Data Rollover
    • £15.00 per month
    12 month contract From iD Mobile
  • ID sim only
    4G
    • 100GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • Free Data Rollover
    • £18.00 per month
    12 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 3GB data 1 month £6.00
Plusnet Mobile sim only 10GB data 1 month £8.00
Plusnet Mobile sim only 12GB data 1 month £10.00
  • Plusnet Mobile sim only
    4G
    • 3GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • Roam like at home
    • £6.00 per month
    1 month contract From Plusnet Mobile
  • Plusnet Mobile sim only
    4G
    • 10GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • Roam like at home
    • £8.00 per month
    1 month contract From Plusnet Mobile
  • Plusnet Mobile sim only
    4G
    • 12GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • Roam like at home
    • £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 2GB data 1 month £5.00
SMARTY sim only 50GB data 1 month £15.00
SMARTY sim only Unlimited data 1 month £20.00
  • SMARTY sim only
    4G
    • Exclusive
    • 2GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • £5.00 per month
    1 month contract From SMARTY
  • SMARTY sim only
    4G
    • 50GB of 4G data
    • Unlimited minutes
    • Unlimited texts
    • £15.00 per month
    1 month contract From SMARTY
  • SMARTY sim only
    4G
    • Unlimited 4G data
    • Unlimited minutes
    • Unlimited texts
    • £20.00 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
    5G
    • Unlimited 5G data
    • Unlimited minutes
    • Unlimited texts
    • £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.

Provider Data Amount Contract Length Monthly Costs
Vodafone sim only 5GB data 1 month £28.00
Vodafone sim only 20GB data 1 month £33.00
Vodafone sim only Unlimited data 1 month £36.00
  • Vodafone sim only
    5G
    • 5GB of 5G data
    • Unlimited minutes
    • Unlimited texts
    • £28.00 per month
    1 month contract From Vodafone
  • Vodafone sim only
    5G
    • 20GB of 5G data
    • Unlimited minutes
    • Unlimited texts
    • £33.00 per month
    1 month contract From Vodafone
  • Vodafone sim only
    5G
    • Unlimited 5G data
    • Unlimited minutes
    • Unlimited texts
    • Maximum download speed 2mbps
    • £36.00 per month
    1 month contract From Vodafone

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.