By DealPriceCheck · Published and checked 6 September 2026
A tenner a month is enough for a surprisingly capable UK mobile plan. The useful comparison is not just data: look at network coverage, flexibility, roaming and the features you will actually use.
The sub-£10 market runs from low-data plans for light users to much larger 5G allowances for people who stream, tether and use mobile data every day. A bigger allowance is not automatically better if the network is weak where you live, the price is introductory, or the plan does not travel well.
For this guide, “under £10” means a monthly budget of £10 or less. Use the live results below for exact, current prices and terms.
Quick picks from current offers
These labels describe a specific, visible criterion. They are not sponsored rankings and are generated from validated offers costing £10 or less.
Selected providers — not whole of market. Prices and availability can change; check the provider’s website before purchase.
Pick your SIM in 30 seconds
I just want the cheapest sensible plan
Start with the lowest monthly-price cards. That can be enough for messaging, maps, email, occasional browsing and people who spend most of the day on Wi-Fi. If your phone normally uses only a few GB, paying for a huge allowance does not improve the service.
I use mobile data every day
Compare the larger data allowances close to £10, but check the minimum term first. The cheapest GB-per-pound deal can be less useful than a rolling plan if you expect to switch again soon.
I hate contracts
Look for 30-day, one-month, rolling or cancel-anytime terms. A large allowance is less attractive if it locks you in when you wanted flexibility.
I travel in Europe
Check roaming before headline UK data. A very large UK allowance may have a much smaller roaming fair-use limit, while a different provider may include a stronger travel benefit.
Do not infer eSIM support from the underlying network. Use the eSIM filter and the provider’s final ordering journey to confirm that the exact plan and your handset are supported.
This range can work well for light use, a spare phone, a child’s phone or a low-use work number. Check the included data, rolling versus fixed term, roaming, 5G and the cost of any extra data. If you regularly need add-ons, moving up a tier can cost less overall.
Around £7–£8
This is often the value-heavy part of the market: enough data for regular social media, music, navigation, browsing and some video away from Wi-Fi. It is a sensible starting point for people who use roughly 10–30GB a month.
Around £9–£10
Providers compete hardest here, but the offers can mean very different things: more data on a fixed term, less data with rolling flexibility, social-media perks, stronger roaming or a temporary data boost. GB per pound is useful, but it is not the whole comparison.
Live market snapshot
What £10 buys right now
Calculated from validated offers checked at build time.
Cheapest qualifying plan£4.90 / monthMedian monthly price£8.00Largest data allowance100 GBQualifying providers11Rolling / 30-day plans22Plans with eSIM23Plans with roaming information28
Selected providers — not whole of market. The figures are not a claim of whole-market coverage.
Five things that can matter more than another 20GB
1. Coverage where you actually use the phone
Check home, work, your commute and regular weekend locations. National coverage percentages cannot tell you whether your kitchen or office is a weak spot. Ofcom’s postcode-level coverage checker is a useful independent starting point.
A longer contract can offer far more data at the same monthly price, but only if you are comfortable keeping the plan. Ask whether you would still choose the same network if a better offer appeared in three months.
3. Roaming allowance
Cheap UK SIMs vary sharply. Some providers include EU roaming from the normal allowance, some set a smaller fair-use cap and others require a separate roaming pass. If you travel several times a year, this can be worth more than saving £1 a month.
4. Introductory prices and promotions
Look at what happens after a headline offer ends. A cheap SIM might be a normal rolling price, a fixed-price contract, a temporary discount or a temporary data boost. Where a provider supplies the information, DealPriceCheck keeps introductory and ongoing pricing separate rather than treating a promotion as permanent.
5. Features you would actually notice
eSIM, Wi-Fi Calling, data rollover, international minutes, tethering and no annual price rises can be worth more than unused data. Choose the plan that fits your actual use, not only the largest number on a card.
Cheap-SIM traps worth checking
Intro price shown as permanent: check the price and allowance after the offer period.
Giant promotional data allowance: verify what happens when the boost expires.
Paying for unused data: check the last two or three months in your phone settings.
Ignoring the network: a reliable lower-data SIM can be better value than a larger allowance with poor local signal.
Treating every “no contract” label as identical: read the actual minimum term and cancellation rules.
Providers worth checking below £10
Talkmobile
Talkmobile is worth comparing for aggressive 30-day data pricing, 4G and 5G, Wi-Fi Calling, eSIM, stated no annual price rises and European roaming terms. Check the current plan card because some longer offers use introductory discounts before an ongoing price applies.
iD is particularly relevant for rolling-plan value, eSIM, no annual SIM-only price rises, inclusive roaming and one-month data rollover. It also offers handset plans, which can matter if you expect to replace a phone later.
SMARTY is a useful reference point for simple rolling plans, eSIM, 5G, EU roaming and VodafoneThree network sharing where deployed. Compare the normal allowance with any time-limited data boost before deciding.
Lebara is particularly relevant when international calls or roaming matter, thanks to its 30-day plan style, international minutes and EU/India roaming terms on eligible plans.
giffgaff is a useful flexibility-versus-contract comparison. VOXI can suit social-media users, but roaming and promotional data terms deserve close attention. Neither should be judged from the headline data figure alone.
A hard £10 ceiling is not always the cheapest decision overall. Spending more can make sense when you genuinely need more data, an unlimited plan replaces another connectivity cost, the dearer plan includes roaming you would otherwise pay for, or a slightly higher price buys the flexibility you need.
How DealPriceCheck ranks cheap SIM deals
Qualifying plans must cost £10 or less. We then compare ongoing monthly price, data allowance, minimum term, confirmed network access, 5G, roaming, eSIM / Wi-Fi Calling / rollover, price-rise policy and the checked date. Affiliate or commercial relationships do not make a weaker deal rank above a stronger one. DealPriceCheck compares selected providers and is not a whole-of-market service.
How to switch without losing your number
You can normally keep your UK mobile number. Text PAC to 65075 from the number you want to keep. Your current provider sends a Porting Authorisation Code; give that code to the new provider to arrange the transfer. Ofcom says a PAC is valid for 30 days and a normal switch should complete within one working day after the new provider receives it.
Before moving, check local coverage, any early termination charge, whether the old contract has ended and handset compatibility.
All current SIM-only deals for £10 or less
Use the filters and sort order to compare the current validated offers. This list is ordered by monthly price; DealPriceCheck does not yet present an authoritative best-value rank.
NetworkVodafoneThreeContract30-day rolling5GIncludedeSIMeSIMEU roamingPaid roaming pass · 20GBPrice risesNo annual price risesPromotion3x data offer ends 30 September 2026. After the offer, this plan returns to 20GB.EligibilityUK only; provider terms apply.Minimum term cost£10.00Checked8 Sept 2026
Selected providers — not whole of market. Prices and availability can change; check the provider’s website before purchase.
Frequently asked questions
Can I get a good SIM-only deal for under £10?
Yes. Depending on the current offers, £10 or less can buy anything from a basic rolling plan to a large 5G data allowance. Compare the live results for the current options.
What is the best SIM-only deal under £10?
There is no permanent winner. The better plan depends on local coverage, data use, contract length, roaming and features such as eSIM or data rollover.
Can I get a 5G SIM for less than £10?
Yes. Several selected providers have verified 5G plans within the £10 budget at some price points. Use the live filters to see the current options.
Can I get a no-contract SIM for under £10?
Yes. Several selected providers offer rolling or 30-day options at £10 or less. Check the exact minimum term before buying.
Which cheap SIM is best for EU roaming?
It depends on where you travel and the allowance you need. Roaming destinations and fair-use limits differ sharply between providers.
Are cheap SIM-only deals slower?
Not automatically. Real speed depends on network, local capacity, coverage, handset and any provider-specific restriction.
Is an 18-month SIM better value than a rolling SIM?
Sometimes. A longer contract can offer more data at the same monthly price, while a rolling plan makes it easier to change when a better deal appears.
Can I keep my number when switching to a cheaper SIM?
Usually, yes. Text PAC to 65075 from the number you want to keep, then give the code to the new provider. Ofcom says a PAC is valid for 30 days.
Sources and methodology
The live modules use manually validated normalized offer records. Editorial network, roaming and switching information is based on the relevant provider pages and Ofcom guidance checked for this guide.
