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30-day SIM deals

Looking for a short-term 30-day SIM only deal? Keep reading to find out everything you need to know about cheap SIM only 30-day mobile phone contracts.

List of SIM Only deals

Sorted by: Uswitch Promoted

  1. SMARTY SIM deal

    Uses Three's Network

    SMARTY logo

    £15.00 a month

    1 month contract

    Unlimited5G data

    Uswitch Exclusive
    • EU roaming included
    • Best SIM Only Network
    • No 2024 price rise
  2. iD Mobile SIM deal

    Uses Three's Network

    iD Mobile logo

    £10.00 a month

    1 month contract

    80 GBof 5G data

    Uswitch Exclusive
    • 3 months' Free Apple TV+
    • Free roaming up to 30GB
    • No 2024 price rise
  3. iD Mobile SIM deal

    Uses Three's Network

    iD Mobile logo

    £8.00 a month

    1 month contract

    50 GBof 5G data

    • 3 months' Free Apple TV+
    • Free roaming up to 30GB
    • No 2024 price rise
  4. iD Mobile SIM deal

    Uses Three's Network

    iD Mobile logo

    £7.00 a month

    1 month contract

    25 GBof 5G data

    • 3 months' Free Apple TV+
    • Free roaming up to 30GB
    • No 2024 price rise
  5. Talkmobile SIM deal

    Uses Vodafone's Network

    Talkmobile logo

    £16.00 a month

    1 month contract

    Unlimited5G data

    • EU roaming included
    • No 2024 price rise
  6. Talkmobile SIM deal

    Uses Vodafone's Network

    Talkmobile logo

    £9.95 a month

    1 month contract

    70 GBof 5G data

    • EU roaming included
    • No 2024 price rise
  7. Talkmobile SIM deal

    Uses Vodafone's Network

    Talkmobile logo

    £7.95 a month

    1 month contract

    30 GBof 5G data

    • EU roaming included
    • No 2024 price rise
  8. Talkmobile SIM deal

    Uses Vodafone's Network

    Talkmobile logo

    £4.95 a month

    1 month contract

    4 GBof 5G data

    • EU roaming included
    • No 2024 price rise
  9. iD Mobile SIM deal

    Uses Three's Network

    iD Mobile logo

    £6.00 a month

    1 month contract

    8 GBof 5G data

    • 3 months' Free Apple TV+
    • Free roaming up to 30GB
    • No 2024 price rise
  10. SMARTY SIM deal

    Uses Three's Network

    SMARTY logo

    £10.00 a month

    1 month contract

    60 GBof 5G data

    • EU roaming included
    • Best SIM Only Network
    • No 2024 price rise
  11. iD Mobile SIM deal

    Uses Three's Network

    iD Mobile logo

    £16.00 a month

    1 month contract

    Unlimited5G data

    • 3 months' Free Apple TV+
    • Free roaming up to 30GB
    • No 2024 price rise
  12. Talkmobile SIM deal

    Uses Vodafone's Network

    Talkmobile logo

    £6.95 a month

    1 month contract

    15 GBof 5G data

    • EU roaming included
    • No 2024 price rise
  13. Talkmobile SIM deal

    Uses Vodafone's Network

    Talkmobile logo

    £11.95 a month

    1 month contract

    120 GBof 5G data

    • EU roaming included
    • No 2024 price rise
  14. Asda Mobile SIM deal

    Uses Vodafone's Network

    Asda Mobile logo

    £5.00 a month

    1 month contract

    3 GBof data

    • EU roaming included
    • No 2024 price rise
  15. SMARTY SIM deal

    Uses Three's Network

    SMARTY logo

    £6.00 a month

    1 month contract

    6 GBof 5G data

    • EU roaming included
    • Best SIM Only Network
    • No 2024 price rise
  16. Talkmobile SIM deal

    Uses Vodafone's Network

    Talkmobile logo

    £5.95 a month

    1 month contract

    6 GBof 5G data

    • EU roaming included
    • No 2024 price rise
  17. SMARTY SIM deal

    Uses Three's Network

    SMARTY logo

    £7.00 a month

    1 month contract

    15 GBof 5G data

    • EU roaming included
    • Best SIM Only Network
    • No 2024 price rise
  18. SMARTY SIM deal

    Uses Three's Network

    SMARTY logo

    £12.00 a month

    1 month contract

    125 GBof 5G data

    • EU roaming included
    • Best SIM Only Network
    • No 2024 price rise
  19. iD Mobile SIM deal

    Uses Three's Network

    iD Mobile logo

    £12.00 a month

    1 month contract

    120 GBof 5G data

    • 3 months' Free Apple TV+
    • Free roaming up to 30GB
    • No 2024 price rise
  20. SMARTY SIM deal

    Uses Three's Network

    SMARTY logo

    £8.00 a month

    1 month contract

    16 GBof 5G data

    • EU roaming included
    • Best SIM Only Network
    • No 2024 price rise
Can't find what you're looking for?

Uswitch 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 Uswitch'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.

Please note: Mobile networks may increase monthly prices in line with the retail or consumer price index each year during the length of your contract. Please refer to individual network's terms and conditions before signing up.

Author: Ray Ali Last updated: 23rd January 2024

How does a 30-day SIM work? 

A one-month SIM only deal is the same as a 12-month and 24-month SIM only deal – you’re just tied to the contract for a considerably shorter period of time. That means you’re free to ditch the deal at any point with just 30 days’ notice. 

Aside from that, you still get an allowance of data, calls and texts, just as you would with a longer SIM only deal. You don’t have to renew every month, either. The deal will continue to roll until you decide to cancel.

What are the pros and cons of a 30-day SIM deal?

  • Leave the contract at any point with 30-days’ notice

  • Wide range of plans on offer from many networks

  • Minimal credit check, if at all

  • Ideal SIM only stopgap solution

  • You might get more for your money on a longer deal

  • Switching networks for a short time may feel like a bit of a hassle

  • Longer-term SIM plans usually include better benefits

What does a 30-day rolling contract mean?

A 30-day rolling contract is easy to explain – it's simply an agreed payment that lasts 1 month, but you're free to continue using it for as many months as you like on the same terms. It continues to roll on until you decide to stop.

What network providers offer 30-day SIM deals? 

Most UK networks offer one-month SIM only deals, from household names like Vodafone and Three, to smaller providers, like Smarty and iD Mobile.

Vodafone 30-day SIM only deals

Vodafone is one of the UK’s biggest networks, with vast coverage throughout the country. You can grab a 30-day SIM only plan on various data options and some deals also offer inclusive roaming in up to 81 locations.

Three 30-day SIM only deals

Three’s short-term deals cover a range of data plans at attractive prices. Some plans also include tethering and EU roaming. 

giffgaff 30-day SIM only deals

giffgaff offers 30-day 'goody bags', which include different data allowances and even EU-inclusive roaming. giffgaff is powered by O2’s network. 

Virgin Mobile 30-day SIM only deals

Virgin Mobile’s SIM only deals can be purchased on 30-day rolling plans. You can choose from a broad range of data allowances, starting at 4GB per month and going right up to unlimited data.

You’ll get unlimited calls and texts as standard, as well as extras on some plans, such as EU roaming, data rollover and data-free social messaging on sites like WhatsApp and Facebook. 

Smarty 30-day SIM-only deals

Smarty is famed for its low-cost plans and a service that runs on Three’s network. One of Smarty’s attractive features is money off bills in exchange for unused data.  

iD Mobile

Choose an iD Mobile 30-day SIM only deal and you’ll get roaming in 50 locations and a network run on O2’s infrastructure.  

How do I choose the best 30-day SIM deal?

Choosing the best 30-day SIM only deal comes down to your specific needs and requirements. Think about how much data you need, and how much you’re looking to pay. Then compare 30-day offers from UK networks to see which is most suitable for your needs.

What do I do after my 30-day SIM deal finishes?

Once the 30 days of your SIM only deal is up, either continue using and keep the deal rolling or choose another deal to switch to. 

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

No, you don’t have to top up a 30-day SIM only plan. The deal will continue on a rolling month-to-month basis until you choose to end it.

How do I cancel my 30-day SIM plan?

Just contact your network and inform them that you no longer wish to continue with the plan, and either choose a new offer from the same network or switch to another provider.

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