SMARTY SIM only offers: 50GB for £8, 70GB for £9
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We show you the best choices in SMARTY's SIM only range this month, after comparing them against every other network. Last updated: 28th November 2025.
SMARTY's best SIM only deals
This month's overall best SMARTY SIM only deal
just
£8
a month
✔ Unlimited mins and 50GB data See full deal
at smarty.co.uk
(opens in new window)
Out of all SMARTY's SIM only plans they've got running this November, our current best pick would be their discounted £8 one below. It's on a 1‑month deal, gets you 50GB data, plus unlimited minutes and texts as well:
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. See which networks that are cheaper here:
SMARTY's 70GB for £9 plan is a good option too
just
£9
a month
✔ Unlimited mins and 70GB data See full deal
at smarty.co.uk
(opens in new window)
If you're more data-hungry, have a look at SMARTY's discounted 70GB SIM below at £10 £9 a month, as it's another good deal. It's on a 1‑month plan and comes with 70GB data, unlimited minutes and texts:
With £1 off per month, the total saving if you spent a year on the deal adds up to £12.
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. Here's where else you can get a lower price:
Their £10 for 90GB plan is a decent deal for November
just
£10
a month
✔ Unlimited mins and 90GB data See full deal
at smarty.co.uk
(opens in new window)
To satisfy even bigger data needs, another option for you on SMARTY is their discounted 1‑month SIM below, which costs £12 £10 a month for 90GB data and comes with unlimited minutes and texts:
You’ll save £24 if you stayed on the deal a whole year, adding up that £2 monthly saving.
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). See who's offering it for less here:
They're also offering 160GB for £12 on SIM only currently
just
£12
a month
✔ Unlimited mins and 160GB data See full deal
at smarty.co.uk
(opens in new window)
If you think you'll need even more data, SMARTY have got a discounted £15 £12 deal on SIM only we think's worth looking at. It gets you 160GB data, unlimited minutes and texts and it's a 1‑month plan:
It’d be a total discount of £36 if you stayed on the deal for a whole 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. Here's where you can beat it on other networks:
£17.50 for unlimited data is SMARTY's next best SIM deal in November
just
£17.50
a month
✔ Unlimited mins and unlimited data See full deal
at smarty.co.uk
(opens in new window)
For those needing even more data, we think this discounted unlimited data 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 £20 £17.50 a month:
Stick on the deal for a whole year and that monthly saving of £2.50 would add up to a total discount of £30.
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. 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