SMARTY SIM only offers: 80GB for £8, 200GB for £12

The best SIM only deal on SMARTY this month

Out of all the SIM only plans available this May on SMARTY, we'd say their best value deal is their 1‑month SIM below, which gets you 80GB data, plus unlimited minutes and texts for £10 a month:

Unlimited minutes + Unlimited texts + 40GB 80GB data (5G) = £10 £8 a month for 15 months, then £10 (1‑month plan, no contract)
See full deal

Reverts to 40GB after 15 months
🛈 No annual price rises

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 other networks you can beat it on:

Cheaper alternatives to this deal

Unlimited minutes + Unlimited texts + 25GB 80GB data (5G) = £16 £8 a month (12‑month contract)
See full deal

🛈 Increased to: £9.25 on April 1 2026

Or their £12 for 200GB SIM plan is worth a look too

For more monthly data, you might like the £12 SIM only deal running on SMARTY at the moment. It's a 1‑month plan, which comes with 200GB data, unlimited minutes and texts too:

Unlimited minutes + Unlimited texts + 100GB 200GB data (5G) = £0 £12 a month (1‑month plan, no contract)
See full deal

Reverts to 100GB after 15 months
🛈 No annual price rises

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 with cheaper plans here:

Cheaper alternatives to this deal

Unlimited minutes + Unlimited texts + 0MB 250GB data (5G) = £22 £12 a month (12‑month contract)
See full deal

🛈 Increased to: £13.50 on April 1 2026

Unlimited minutes + Unlimited texts + 0MB 200GB data (5G) = £0 £12 a month (1‑month contract)
See full deal

🛈 No annual price rises

SMARTY are also offering unlimited data for £16 on SIM only

To get even more data, we'd say this is one of SMARTY's best deals on SIM only this month too. It's a 1‑month plan, comes with unlimited data, unlimited minutes and texts for £20 a month:

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £20 £16 a month for 15 months, then £20 (1‑month plan, no contract)
See full deal

🛈 No annual price rises

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's which other networks can beat it:

Cheaper alternatives to this deal

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £0 £15 a month (24‑month contract)
See full deal

🛈 No annual price rises

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £18 £9 a month for 6 months, then £18 (24‑month contract)
See full deal

🛈 No price rise guaranteed until 2026

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £28 £16 a month (12‑month contract)
See full deal

🛈 Increased to: £17.50 on April 1 2026

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