If you have poor credit, a thin credit file, or you have recently moved to the UK, a refused mobile application is frustrating — and hard credit searches can make the next attempt harder. The good news is that several well-known UK networks simply do not run a credit check on their SIM only plans.
This guide explains how no-credit-check SIMs work, which networks typically offer them, and how to pick the best-value plan for your data use. Live prices below are pulled from our database — we do not hardcode pounds-and-pence figures that go stale within days.
Cheapest no credit check SIM only deals right now
Showing current deals from networks that operate a no-credit-check model on rolling SIM only plans: giffgaff, Smarty, VOXI, Lebara and Mozillion. Always confirm the specific plan terms at checkout.
What is a no credit check SIM only deal?
A no credit check SIM only deal is a mobile plan where the network does not look at your credit history before activating your SIM. You typically pay month to month on a short rolling term, with no soft or hard search on your file — useful if you have poor credit, a thin file, or you simply prefer not to trigger a credit search for a SIM only plan.
That does not mean every plan on those networks is identical. Plan features, roaming, support style and data allowances still differ, so treat "no credit check" as an eligibility filter first, then compare live prices and terms the same way you would any other SIM.
Why 30-day rolling plans usually skip the check
Most true no-credit-check SIMs are 30-day rolling (or similar short rolling terms). Either side can end the agreement with about a month's notice, so the network's financial exposure is limited to a single billing cycle. Fixed 12 or 24-month contracts more often involve a credit check — even for SIM only — because you are committing for longer.
Rolling plans also help on value: when a cheaper deal appears, you can switch without exit fees. For the practical steps, see our PAC code switching guide. If you are still weighing rolling versus fixed-term on price alone, how to find the cheapest SIM only deals covers that trade-off in more detail.
Which networks typically offer no credit check SIMs?
These five MVNOs are the ones we treat as the core no-credit-check set on Smart Comparison — the same providers filtered on our comparison tools:
| Network | Runs on | Best known for |
|---|---|---|
| giffgaff | O2 | Community support, goodybags, unused-data credit |
| Smarty | Three | Simple rolling plans, account-credit data rollover |
| VOXI | Vodafone | Endless social/streaming features on many plans |
| Lebara | Vodafone | International calling focus, EU roaming on many plans |
| Mozillion | Host network varies | Straightforward rolling SIM only options |
Coverage matches the host network's masts — there is no separate "MVNO signal". For how that wholesale model works, see what an MVNO is.
Want a closer read on two popular pairings? Compare giffgaff vs Smarty or VOXI vs Lebara. Budget Vodafone options beyond VOXI and Lebara are covered in our Talkmobile review.
How to choose the best-value no credit check deal
Skipping the credit check does not mean every plan on those networks is automatically right for you. Match the deal to how you actually use your phone:
- →Check last month's mobile data use in your phone settings, then add a little headroom — do not default to unlimited unless you need it.
- →Prefer 30-day rolling if you want the option to switch when a better deal appears.
- →Confirm 4G vs 5G, EU roaming, and any fair-usage wording on the specific plan before you buy.
- →Watch for introductory prices that rise after a set period — compare the ongoing price, not only the first-month headline.
Light users (roughly under 10GB) should start with our light data SIM guide; heavy streamers and hotspot users may prefer the unlimited data deals guide— then filter for networks that skip the credit check when you compare live prices.
Compare live no credit check SIM deals
Prices update as deals change. Start on the no-credit-check filter, then adjust data allowance and contract length to match how you use your phone.
Compare no credit check deals →Frequently asked questions
Will signing up for a no credit check SIM affect my credit score?
No. Networks that skip credit checks entirely — including giffgaff, Smarty, VOXI, Lebara and Mozillion — do not run a soft or hard search on your file when you join. There is nothing for lenders to see, and your score is unaffected whether you are approved or not.
Why do some SIM only deals need a credit check and others don't?
It comes down to risk for the network. Fixed-term contracts (especially 12 or 24 months) involve a longer commitment, so many networks run a credit check before accepting you. 30-day rolling and PAYG-style plans are paid month to month with little or no borrowing involved, so the same networks — or specialist MVNOs built around that model — can skip the check entirely.
Can I get a phone on finance with no credit check?
Usually not through the same route. Handset finance and phone contracts typically do involve a credit assessment because you are borrowing the cost of the device. If you need a phone as well as a SIM, buying a handset outright (new or refurbished) and pairing it with a no-credit-check SIM only plan is the more reliable path if you want to avoid a credit search.
What's the difference between no credit check and a soft credit check?
A soft check lets the network see a summary of your credit history without leaving a footprint other lenders can see. A hard check does leave a mark, and several hard checks close together can temporarily lower your score. True no-credit-check networks do neither — they simply do not assess your credit at all.
Are no credit check SIM deals worse value?
Not necessarily. Many of the cheapest UK SIM only deals sit on rolling MVNO plans that skip credit checks by design. The trade-off is usually flexibility and packaging — online-only support, fewer high-street stores, and plan features that differ from a big-four retail contract — not automatically higher prices. Always compare live deals rather than assuming a credit-checked contract is better value.
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