Cheap SIM cards.
Big data. Low price.
Some of the cheapest SIM cards available right now. Starting from £5 per month on the O2 and Vodafone networks, with free delivery and no long-term commitment required.
One of the cheapest SIM cards we compare is Lebara's 5GB plan at £5 per month on Vodafone. For a cheap SIM card with a decent data allowance, giffgaff's 40GB plan at £10 per month on O2 is the best value. Both come with free delivery, no credit check, and no long-term contract required.
Cheapest SIM cards available now
giffgaff 40GB (30 day)
Lebara 5GB (30 day)
Asda Mobile 10GB (24 month)
Lebara 30GB (12 month)
giffgaff 75GB (30 day)
Lebara 50GB (12 month)
Why cheap SIM cards are just as good
There is a common assumption that a cheap SIM card means a worse experience. It does not. The providers on this page are MVNOs, which means they rent capacity from O2 and Vodafone rather than running their own masts. The signal, coverage, and speeds you get are identical to what you would get on the parent network directly. The only difference is the price.
giffgaff runs on O2. Lebara and Asda Mobile run on Vodafone. Same masts, same coverage, same speeds. Someone currently paying £40 per month with EE could switch to a giffgaff or Lebara SIM with more data for a fraction of the price.
Can I get a free SIM card?
Yes. Most providers will send you a free SIM card with no obligation. You activate it when you choose a plan and start paying only from that point. Ordering a free SIM before you commit is a sensible way to check the network signal at your home address. If the coverage is not right, you have not spent anything.
giffgaff and Lebara both offer free SIM cards on request. Just choose the plan you want during checkout and the SIM arrives by post within a few days. See our full SIM only comparison if you want to explore more options across all data allowances and contract lengths.
Questions people ask
The cheapest SIM cards come from budget providers like Lebara, giffgaff, and Asda Mobile. They run on the same O2 and Vodafone infrastructure as more expensive networks. You can order online and receive the SIM by post within a few days, usually for free.
Yes. Most UK providers send a free SIM card with no obligation. You only pay when you activate a plan. giffgaff and Lebara both offer free SIM cards. It is worth ordering one to check coverage in your area before committing to a plan.
The cheapest monthly SIM we compare is Lebara's 5GB plan at £5 per month on Vodafone. For a better data allowance, giffgaff's 40GB plan at £10 per month on O2 is excellent value with no contract. On a 12-month contract, Lebara's 30GB plan at £9 per month is hard to beat.
Yes. Budget SIM providers run on exactly the same network infrastructure as the major operators. giffgaff uses O2. Lebara and Asda Mobile use Vodafone. The signal and coverage is the same. You are paying less because budget providers have lower overheads, not because the service is worse.
Click through to your chosen provider, select your plan, and complete the order. The SIM arrives by post within a few days, usually free of charge. Activate it online or in the provider's app. If you want to keep your existing number, get a PAC code from your current provider first and enter it during activation.
Related deals and guides
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