Compare SMARTY SIMs: 50GB for £8, 15GB for £6
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Find out which of SMARTY's plans came out top when we compared their pricing on SIM only with the other UK mobile networks. Last updated: 26th February 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)
Out of all the SIM only plans available this February on SMARTY, we'd say their best value deal is their discounted 1‑month SIM below, which gets you 50GB data, plus unlimited minutes and texts for £8 a month:
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:
They've also got a 15GB for £6 SIM plan at the moment
just
£6
a month
✔ Unlimited mins and 15GB data See full deal
at smarty.co.uk
(opens in new window)
For a smaller amount of data, another option for you on SMARTY is their discounted 1‑month SIM below, which costs £6 a month for 15GB data and comes with unlimited minutes and texts:
It does enough to get into our pick of SMARTY's best SIMs but that doesn't mean it's unbeatable on price. Other providers (even ones that use the Three network) can beat it. See the networks that beat it here:
SMARTY's £7 for 30GB is our next best choice now
just
£7
a month
✔ Unlimited mins and 30GB data See full deal
at smarty.co.uk
(opens in new window)
For people who need more data, SMARTY have got a discounted £7 deal on SIM only we think's worth looking at. It gets you 30GB data, unlimited minutes and texts and it's a 1‑month plan:
Compared to SMARTY's other deals, this comes out among the best. But it's worth knowing you can get a lower price elsewhere, even on other providers that use the Three network. Here are the networks where it'd cost less:
Their £9 SIM with 80GB is our next favourite this February
just
£9
a month
✔ Unlimited mins and 80GB data See full deal
at smarty.co.uk
(opens in new window)
If you want even more data, we think this discounted 80GB is one of the best SIM only plans on SMARTY too. It's on a 1‑month deal, comes with unlimited minutes and texts - all for £10 £9 a month:
In total, that discount of £1 a month means you’re looking at a saving of £12 if you stayed on the deal for a year.
It might be one of SMARTY's best deals on SIM only but you can get a lower price for a similar plan on other providers, even ones that use the Three network. See which networks that are cheaper here:
We also like their £10 for 100GB plan
just
£10
a month
✔ Unlimited mins and 100GB data See full deal
at smarty.co.uk
(opens in new window)
For even more data, we also think this discounted £12 £10 SMARTY SIM is one of their best options. It comes with 100GB data, unlimited minutes and texts on a 1‑month deal:
Getting £2 off a month means you’ll save £24 in total, if you spend a whole year on the deal.
This is good for SMARTY but it's not an unbeatable price. You can get similar SIM only plans for less with some other providers, even ones that also use the Three network. Here's where else you can get a lower price:
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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