No contract.
No commitment.
The best 30-day rolling SIM deals in the UK. Switch when you want, cancel when you want, and never pay an exit fee.
The best no contract SIM deals come from giffgaff and Chattr, both running on O2. giffgaff's 40GB 30-day plan at £10 per month is the best value flexible plan in the UK right now. For unlimited data with no contract, Chattr at £20 per month is the standout. Both can be cancelled any time with no exit fee.
Best no contract SIM deals right now
giffgaff 75GB (30 day)
Chattr Unlimited (30 day)
Lebara 50GB (30 day)
Lebara Unlimited Plus (30 day)
No contract vs 12-month, which is right for you?
No contract is better if...
- You might want to switch networks in the next year
- You travel or move around and need flexibility
- You are buying a new phone soon and want to reassess
- You just want the peace of mind of no long commitment
12-month is better if...
- You are settled and want the lowest monthly price
- You use a lot of data and want the best GB per pound
- You know which network you want and are happy to commit
- The saving over a year is significant enough to justify it
The price difference between a 30-day and a 12-month plan is smaller than it used to be. giffgaff's 40GB plan is £10 per month on a 30-day rolling basis. There is no 12-month equivalent to directly compare it to at that price point. For most people, the flexibility of no contract is worth the small premium.
Where 12-month plans pull ahead is on the higher data tiers. Lebara's 100GB on a 12-month contract at £18 per month is meaningfully cheaper than the 30-day equivalent at £20 per month. If you are a heavy data user who is confident about staying on the same plan, locking in for 12 months makes financial sense. See our full SIM only comparison for all options including 12-month plans.
Questions people ask
A no contract SIM deal is a monthly rolling plan with no long-term commitment. You pay month to month and can cancel or switch at any time without an exit fee. Most run on 30-day terms. They cost slightly more per month than 12-month contracts but give you complete flexibility.
Slightly, yes. A 30-day rolling plan typically costs a few pounds more per month than a 12-month contract for the same data. The gap has narrowed considerably though. For many people the flexibility is worth the small difference, especially if they are likely to want to switch or travel in the next year.
Yes. Ask your current provider for a PAC code before you switch. Give it to your new provider when you sign up and your number transfers automatically, usually within one working day. You can port your number to any SIM plan including 30-day rolling ones.
giffgaff's 40GB plan at £10 per month is the best value flexible SIM in the UK right now. No contract, no credit check, strong O2 coverage, and you can cancel any time. For unlimited data with no contract, Chattr at £20 per month on O2 is the standout option.
Most 30-day rolling plans require 30 days notice. In practice you pay for one final month after you give notice. Some providers let you cancel mid-cycle and stop at the end of that billing period. Check your specific plan terms before cancelling to avoid an unexpected charge.
Related deals and guides
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