Best SIM offers on SMARTY: 35GB for £7, 75GB for £8
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See the most competitive options on SMARTY's SIM only this month. We've compared them against other networks to find the best. Last updated: 1st July 2026.
SMARTY's best SIM only deals
The best SIM only deal on SMARTY this month
just
£7
a month
✔ Unlimited mins and 35GB data See full deal
at smarty.co.uk
(opens in new window)
We think the best value for money SIM only plan on SMARTY for July is their discounted 35GB for £7 deal. It's on a 1‑month plan and comes with unlimited minutes and texts too:
While it's good enough to be in our pick of SMARTY's best SIM only deals, other providers do still have similar plans for less, even ones that also use the Three network. See who's offering it for less here:
Their £8 for 75GB plan is a decent deal for July
just
£8
a month
✔ Unlimited mins and 75GB data See full deal
at smarty.co.uk
(opens in new window)
To get a bigger chunk of data, you might like the discounted £8 SIM only deal running on SMARTY at the moment. It's a 1‑month plan, which comes with 75GB data, unlimited minutes and texts too:
It's definitely one of SMARTY's best. But it's not market-leading. You can get a similar plan on other providers for less, even if you need your SIM to use the Three network. Here's where you can beat it on other networks:
They're also offering 100GB for £10 on SIM only currently
just
£10
a month
✔ Unlimited mins and 100GB data See full deal
at smarty.co.uk
(opens in new window)
If you need even more data, we'd say this is one of SMARTY's best deals on SIM only this month too. It's a discounted 1‑month plan, comes with 100GB data, unlimited minutes and texts for £12 £10 a month:
It’s a discount of £2 a month against the full price, adding up to a £24 saving over a year.
Even though it's in our pick of SMARTY's best SIM only deals, you can actually beat it on price with other providers, including ones that also use the Three network. See lower-priced networks' deals here:
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How SMARTY compare for benefits and SIM only prices
In our full review of SMARTY we like the fact that you get full access to Three’s brilliant 5G network while also getting good WiFi calling and 4G calling (see our Three vs SMARTY guide here).
They offer all their plans as 1-month no-contract deals. They have a wide range of data plans and typically share better value hidden deals with comparison websites like us which are worth keeping an eye out for.
SMARTY are usually one of the cheapest of all UK networks, and are probably the cheapest provider on Three’s network (alongside iD Mobile).
You don’t get many extra benefits on SMARTY. You do get 10% off any extra plans you add to your account. On top of that, SMARTY promise not to raise the cost of your plan while you’re with them.
Useful link: Read our full SMARTY review
What else you should know about SMARTY’s SIM only deals
You’ll receive your SMARTY SIM card within 2 working days of ordering. You’ll receive a package with every size of SIM for any phone. But you can’t get an eSIM on SMARTY (these networks do offer them).
After your SIM arrives you’ll have 14 days to return it if you’re not satisfied. You’ll only get a refund for what you haven’t used. Here are the full details on how to return your SMARTY SIM.
You don’t need to pass a credit check to join SMARTY as you pay for your plan up front. That makes them a great alternative if you failed a credit check for a Three SIM only contract but want to use their network.
If you want to switch over to SMARTY from another network and you want to keep your number you’ll have to request a PAC from your current provider and send it to SMARTY when you’re ready to switch (here’s how).
Useful link: Compare all SMARTY SIMs