SMARTY SIM only offers: 50GB for £8, 15GB for £6
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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: 6th April 2026.
SMARTY's best SIM only deals
Our highest-rated SIM only deal on SMARTY this month
just
£8
a month
✔ Unlimited mins and 50GB data See full deal
at smarty.co.uk
(opens in new window)
Looking at what you can get on SIM only with SMARTY this April, our best-rated deal would be their discounted 1‑month plan below, which comes with 50GB data, plus unlimited minutes and texts for £8 a month:
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 are other networks you can beat it on:
Their £6 for 15GB plan is a decent deal for April
just
£6
a month
✔ Unlimited mins and 15GB data See full deal
at smarty.co.uk
(opens in new window)
For less monthly data, our next best pick of SMARTY SIM only plans is their discounted 1‑month £6 deal below, which gets you 15GB data and unlimited minutes and texts:
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 the networks with cheaper plans here:
They're also offering 30GB for £7 on SIM only currently
just
£7
a month
✔ Unlimited mins and 30GB data See full deal
at smarty.co.uk
(opens in new window)
For more monthly data, SMARTY are also offering this discounted £7 SIM, which includes 30GB 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's which other networks can beat it:
£9 for 80GB is SMARTY's next best SIM deal in April
just
£9
a month
✔ Unlimited mins and 80GB data See full deal
at smarty.co.uk
(opens in new window)
To get even more data, you might like the discounted £10 £9 SIM only deal running on SMARTY at the moment. It's a 1‑month plan, which comes with 80GB data, unlimited minutes and texts too:
That’s £12 you’d save over a year on the same deal, thanks to the £1 monthly discount.
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 where you can get it for less here:
There's also a nice 100GB for £10 plan with them this month
just
£10
a month
✔ Unlimited mins and 100GB data See full deal
at smarty.co.uk
(opens in new window)
For people who 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:
That means a total saving of £24 if you added up that £2 monthly discount over a whole year.
In comparison to the rest of SMARTY's current SIM only plans, it's one of the best. But it is beatable on price, even if you're set on joining a provider that uses the Three network. Here are the networks offering it cheaper:
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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