Last updated: Saturday 24 October 2026 (Europe/London).
Next update: when SMARTY changes its plans or offers.
By: Switch Editorial Team, Switch Squid Ltd
As of 24 October 2026, SMARTY’s plan page through our link offers 40GB of 5G data with unlimited UK calls and texts for £7 a month on a one-month plan, against 32GB for £8, or 40GB for £10, on SMARTY’s public plan list. SMARTY is a good, no-frills SIM for most people: it runs on Three’s network, has no annual price rises, no credit check and no contract, and includes up to 12GB of EU roaming. The catch is that support is online only, with no phone line or shops, and Three’s coverage is worth checking at your postcode first. This SwitchSquid review covers the network, prices, roaming and how SMARTY compares with giffgaff, iD Mobile and Lebara. We may earn a commission if you buy through links on this page; it doesn’t change the price you pay.
Sources: SMARTY, SMARTY about us and SMARTY plans, checked on 24 October 2026, plus the plan page our link opens.
SMARTY 40GB for £7 a month through our link
- 40GB of 5G and 4G data with unlimited UK calls and texts for £7 a month, when we checked on 24 October 2026 (SMARTY’s public price list: 32GB for £8, or 40GB for £10)
- No code needed: the offer shows on the plan page our link opens; read the offer terms there for eligibility and how long the price lasts
- Main limitation: runs on the Three network, so check coverage first, and support is online only
Is SMARTY any good?
For most people who want a cheap, flexible SIM, yes. SMARTY keeps things simple: every plan is a one-month plan you can change or cancel, you pay upfront so there is no credit check, and it promises no annual price rises. Plans include 5G at no extra cost, WiFi calling, unlimited UK hotspotting and EU roaming. Its Unlimited plan has no fair usage limit in the UK.
SMARTY isn’t for everyone, though. It is 100% online: there are no shops, and help comes through its website, app and community rather than a phone line. It runs on Three’s network, so if Three is weak where you live or work, SMARTY will be too.
What we like
40GB for £7 a month through our link, on a one-month plan.
No annual price rises, no contract and no credit check.
Up to 12GB of EU roaming included, plus unrestricted hotspotting in the UK.
Group plans for up to 8 SIMs, managed from one dashboard.
What to watch
Online-only support, with no phone line.
Coverage depends on Three’s network at your address.
Promotional extra data can come with conditions, so read the offer terms on the plan page.
What network does SMARTY use?
SMARTY runs on Three’s network. Its site says it is “powered by our friends at Three” and that its 4G network covers 99% of the UK outdoor population, while the plan page our link opens quotes 99.5% outdoor coverage. SMARTY is a trading name of Hutchison 3G UK Limited, and its site lists it alongside Vodafone UK, Three UK, VOXI and Talkmobile as part of VodafoneThree.
Population coverage figures are about outdoor signal across the country, so they don’t tell you how good the signal is inside your home. Use SMARTY’s coverage checker with your home and work postcodes before you order, and remember you can leave at the end of any month if it doesn’t work out.
SMARTY plans and prices (checked 24 October 2026)
SMARTY’s public plan list on 24 October 2026, alongside the 40GB and 18GB offers our links open:
Plan | Price a month | Data | Contract | Upfront | Code | Best for |
|---|---|---|---|---|---|---|
SMARTY 40GB (through our link) | £7 | 40GB, offer on the 16GB plan | 1 month | £7 first month, paid upfront | No code needed; offer applied on the plan page | Most people: lots of data for little money |
SMARTY 18GB (only through our link) | £6 | 18GB on the 5GB plan; SMARTY’s public price is 5GB for £6 | 1 month | £6 | No code needed | Light users |
SMARTY 40GB (public list) | £10 | 40GB | 1 month | £10 | None | Compare with our £7 link price |
SMARTY 140GB (public list) | £12 | 140GB, offer on the 100GB plan | 1 month | £12 | None | Heavy streamers |
SMARTY Unlimited | £20 | Unlimited, no UK fair usage limit | 1 month | £20 | None | Hotspot and home broadband backup |
Other public plans on the day: 20GB £9, 150GB £15 and 200GB £17. Data-only SIMs ran from 2GB for £5 to Unlimited for £20. All plans include unlimited UK calls and texts except the data-only SIMs.
SMARTY vs giffgaff, iD Mobile and Lebara
How SMARTY’s £7 plan compares with similar cheap SIMs on 24 October 2026:
SIM | Price a month | Data | Contract | Upfront | Code | 12-month cost | Best for |
|---|---|---|---|---|---|---|---|
SMARTY 40GB (our link) | £7 | 40GB | 1 month | £7 | No code needed | £84 | Flexibility with no price rises |
iD Mobile 50GB | £8 | 50GB | 12 or 24 months | £0 | None | £96 | More data if you are happy with a contract |
giffgaff 40GB | £8 | 40GB (6GB plus 34GB extra free) | 18 months | £0 | None | £96 | Fans of giffgaff happy to commit |
Lebara 30GB | £10 | 30GB | 30 days | £10 | None | £120 | Vodafone network coverage |
The 12-month costs assume the monthly price stays the same, which SMARTY promises for its rolling plans. What the numbers say: SMARTY’s £7 for 40GB is the cheapest of the four: £12 a year less than giffgaff’s 40GB at £8, without tying you in for 18 months, and £36 a year less than Lebara’s 30GB at £10. iD Mobile’s 50GB at £8 gives 10GB more for £1 a month extra, but on a 12- or 24-month contract.
Choose giffgaff 40GB for £8 a month if you are happy to commit for 18 months
- 40GB (6GB plus 34GB extra free) with unlimited UK calls and texts for £8 a month on an 18-month plan, when we checked on 24 October 2026
- No code needed; runs on O2’s network, a good option if Three is weak where you live
- Main limitation: an 18-month commitment, and £1 a month more than SMARTY’s £7 offer
Is SMARTY better than EE?
They are built for different people. EE is a full network with its own masts, shops, phone support and plans with handsets. SMARTY is a low-cost, online-only brand on Three’s network. If EE is the only network with a strong signal where you live, the extra cost may be worth it. If Three’s coverage is good for you, SMARTY costs far less for a similar amount of data and doesn’t raise its price each year. Our EE network SIM deals page shows current EE-network options.
Why is SMARTY so cheap?
Mostly because it runs lean. SMARTY has no high street shops, support is online, and you pay for each month upfront, which removes credit checks and bad-debt costs. It also uses Three’s existing network rather than building its own. You get the same network as Three customers, but without the extras that come with a big-network contract.
SMARTY roaming, eSIM and switching
EU roaming: your usual minutes and texts at no extra cost in EU countries, with up to 12GB of data.
eSIM: available on all plans, as well as SIM, micro-SIM and nano-SIM.
Keep your number: text PAC to 65075 on your current network to get a code valid for a month, then enter it when you join SMARTY.
Referrals: SMARTY says you and a friend can each get up to a £20 gift card when they join through your referral.
Our guide to getting a PAC code explains the switching steps, and if you are torn between two favourites, read our giffgaff vs SMARTY unlimited comparison.
Who it suits
Good fit for SMARTY: Three’s coverage is good where you live, you want a cheap rolling plan and you are happy with online support.
Consider giffgaff or iD Mobile: you are happy to commit, for giffgaff’s 40GB at £8 on O2 over 18 months, or iD Mobile’s 50GB at £8 over 12 or 24 months.
Consider Lebara: Vodafone’s network works better for you.
Consider a big network: you want phone support, shops or a handset deal.
Not sure which SIM suits your usage? Squid AI, SwitchSquid’s AI assistant, can help you compare SIM only deals in a few questions.
Important conditions
The 40GB for £7 offer is on SMARTY’s 16GB plan and shows on the plan page our link opens; read the offer terms there for who qualifies and how long the extra data lasts.
The 18GB for £6 offer is on SMARTY’s 5GB plan and only shows on the plan page our link opens; without it, the same plan is 5GB for £6.
Plans are paid monthly in advance and renew each month unless you cancel.
EU roaming data is limited to 12GB.
5G needs a compatible phone and 5G coverage.
Prices were checked on 24 October 2026 and can change.
FAQ
Is SMARTY a good network?
SMARTY is a good choice for people who want a cheap, flexible SIM and get decent Three coverage. It uses Three’s network, which SMARTY says covers 99% of the UK outdoor population with 4G, and it includes 5G at no extra cost.
What network does SMARTY use?
SMARTY uses Three’s network. It is a trading name of Hutchison 3G UK Limited and sits within VodafoneThree alongside Three, Vodafone, VOXI and Talkmobile.
How much is SMARTY a month?
On 24 October 2026, SMARTY’s public plans ran from 5GB for £6 to Unlimited for £20. Through our link, the plan page showed 40GB for £7 a month on a one-month plan.
Does SMARTY put prices up every year?
No. SMARTY says it doesn’t do annual price rises on its one-month plans. You pay the same each month unless you change plan.
Does SMARTY do a credit check?
No. Because you pay for each month upfront, SMARTY doesn’t run a credit check. That also means there are no surprise bills at the end of the month.
Can I use SMARTY in Europe?
Yes. SMARTY includes your usual minutes and texts in EU countries at no extra cost, with up to 12GB of data. Check the limit before a long trip, because heavy users can go past it.
Does SMARTY have phone support?
No, SMARTY’s support is online. You can use its help articles, community forum and web support team, and manage everything in the app or online dashboard.
Our verdict
If Three’s network works where you live, SMARTY is one of the best-value SIMs you can buy: 40GB for £7 a month through our link, with no contract, no credit check and no annual price rises. Check coverage at your postcode, get your PAC code if you want to keep your number, and order online in a few minutes. If you use less than 18GB a month, our link also opens SMARTY’s 5GB plan with 18GB for £6, which saves you another £1 a month.
Check SMARTY coverage, then get 18GB for £6 through our link if you are a light user
- 18GB for £6 a month, only through our link (SMARTY’s public price is 5GB for £6), with unlimited UK calls and texts, when we checked on 24 October 2026
- Check Three coverage at your home and work postcodes before you order
- SIM or eSIM; keep your number with a free PAC code: text PAC to 65075
