Mobile · Provider guide
Smarty SIM-only deals: every plan and the real cost
Smarty has 6 deals in our table on 25 Oct 2026, from £6.00 a month. The best value is 5GB rolling monthly at a real cost of £6.00 a month (5GB data · Three network · No contract). It states its prices are locked for the contract.
Best-value Smarty plan
Smarty 5GB rolling monthly
5GB data · Three network · No contract · £6.00 a month real cost
The lowest real cost here from a national provider on 25 Oct 2026, with fees and stated price rises counted.
Every Smarty deal we track
Checked 25 Oct 2026| Provider and package | Data | Contract | Monthly price | Real cost | Deal |
|---|---|---|---|---|---|
Smarty 5GB rolling monthly Wi-Fi calling · No annual price rises | Data5GBThree network · 5G | ContractNo contractEU roaming included | Monthly price£6.00Price locked | Real cost£6.00 /mo£72.00 over 12 months | See deal at Smarty (opens in a new tab) |
Smarty 32GB rolling monthly (special offer) Wi-Fi calling · No annual price rises | Data32GBThree network · 5G | ContractNo contractEU roaming included | Monthly price£8.00Price locked | Real cost£8.00 /mo£96.00 over 12 months | See deal at Smarty (opens in a new tab) |
Smarty 40GB rolling monthly Wi-Fi calling · No annual price rises | Data40GBThree network · 5G | ContractNo contractEU roaming included | Monthly price£10.00Price locked | Real cost£10.00 /mo£120.00 over 12 months | See deal at Smarty (opens in a new tab) |
Smarty 140GB rolling monthly (special offer) Wi-Fi calling · No annual price rises | Data140GBThree network · 5G | ContractNo contractEU roaming included | Monthly price£12.00Price locked | Real cost£12.00 /mo£144.00 over 12 months | See deal at Smarty (opens in a new tab) |
Smarty 200GB rolling monthly Wi-Fi calling · No annual price rises | Data200GBThree network · 5G | ContractNo contractEU roaming included | Monthly price£17.00Price locked | Real cost£17.00 /mo£204.00 over 12 months | See deal at Smarty (opens in a new tab) |
Smarty Unlimited rolling monthly Wi-Fi calling · No annual price rises | DataUnlimitedThree network · 5G | ContractNo contractEU roaming included | Monthly price£20.00Price locked | Real cost£20.00 /mo£240.00 over 12 months | See deal at Smarty (opens in a new tab) |
Ranked by real cost; commission never changes the order. Prices checked on each provider's own site on 25 Oct 2026.
Who Smarty suits
Smarty suits budget-minded people who want flexible SIM-only data. Its plans roll every 30 days, so you can leave with a month's notice or less.
It is a good match if you want 5G, unlimited calls and texts, and no annual price rises. There is no credit check, and EU roaming is included, with a 12GB fair use limit. The special offers, such as 140GB instead of 100GB, add extra data for the same plan.
It may not suit heavy data users who travel in Europe often, or anyone who wants a network other than Three. Compare the plans by real cost in the table, then check cheapest SIM-only deals for other options.
Network and coverage
Smarty runs on the Three network, so its plans share Three's coverage. A network is the group of masts that carries your calls and data. Every UK SIM-only brand uses one of four networks: EE, O2, Vodafone or Three. Brands on the same network share its coverage, so the network matters more than the brand name.
Smarty plans include 5G, so you can use 5G wherever Three offers it. Check your home and work postcodes on the provider's site before you switch.
Want a different network? Compare EE SIM-only deals, O2 SIM-only deals and Vodafone SIM-only deals in our table, sorted by real cost.
What it really costs
Smarty plans run on 30-day rolling contracts, so you can leave with a month's notice or less. Our table compares six Smarty plans, from 5GB to unlimited data, ranked by real cost.
Smarty lists no annual price rises. Any rise a provider states for a new contract must be shown in pounds and pence when you sign up.
Smarty also lists unlimited calls and texts, and EU roaming with a 12GB fair use limit. Two special offers add more data: 140GB instead of 100GB, and 32GB instead of 16GB.
Next step: compare all SIM-only deals. The table shows the date its prices were last checked, so you can see how current the figures are.
Straight answers
Questions people ask
- Is Smarty good value?
- Smarty can be good value if you want a budget plan with no annual price rises. Its plans include 5G, unlimited calls and texts, and EU roaming with a 12GB fair use limit. Sort our table by real cost to see how Smarty compares with other SIM-only deals today.
- What network does Smarty use?
- Smarty runs on the Three network. It is a budget brand run by Three (Hutchison 3G UK), so it shares Three's coverage. Every Smarty plan in our table includes 5G. Every UK SIM-only brand runs on one of four networks: EE, O2, Vodafone or Three.
- How do I switch to Smarty and keep my number?
- To keep your number, text PAC to 65075 for your PAC code, then give that code to Smarty when you sign up. Your number moves across in one working day. Contracts agreed online or by phone also come with a 14-day cooling-off period, so you can cancel if you change your mind.