Best SIM only on SMARTY: 35GB for £7, 75GB for £8
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Find the best priced SIM only plans on SMARTY this month. We've compared them all against the rest of the market. Last updated: 17th August 2026.
SMARTY's best SIM only deals
Our favourite SIM only deal this month on SMARTY
just
£7
a month
✔ Unlimited mins and 35GB data See full deal
at smarty.co.uk
(opens in new window)
We think SMARTY's best value option on SIM only this August is their discounted £7 a month plan below, which comes with 35GB data, plus unlimited minutes and texts on a 1‑month deal:
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:
Their £8 for 75GB plan is a decent deal for August
just
£8
a month
✔ Unlimited mins and 75GB data See full deal
at smarty.co.uk
(opens in new window)
For people who need more data, SMARTY are also offering this discounted £8 SIM, which includes 75GB data, unlimited minutes and texts on a 1‑month plan. It's another of their best deals:
While this is a good enough deal to make it into the best of SMARTY's SIMs, you can beat it for price (even if you definitely want a provider that uses the Three network). Here are other networks you can beat it on:
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 want even more data, you might like the discounted £12 £10 SIM only deal running on SMARTY at the moment. It's a 1‑month plan, which comes with 100GB data, unlimited minutes and texts too:
In total, that discount of £2 a month means you’re looking at a saving of £24 if you stayed on the deal for a year.
It's a good enough deal to get into SMARTY's best SIMs but you can actually get a lower price for a similar plan elsewhere, even if you definitely want it to use the Three network. See the networks with cheaper plans 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