Three SIM only deals for October: how they compare on price
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We've taken each of Three's best SIM only plans this month and compared them on price with other UK networks. Here's what we found. SIM Sherpa is your trusty guide. Last updated: 14th October 2024.
Three's best SIM only deals
This month's overall best Three SIM only deal
just
£18
a month
✔ Unlimited mins and unlimited data See full deal
at three.co.uk
(opens in new window)
Three's best SIM only plan this October in our opinion is their £18, 12‑month deal below, which comes with unlimited data, plus unlimited minutes and texts for your money:
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £27 £18 a month (12‑month contract)
See full deal
In comparison to the rest of Three'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:
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £20 £15 a month (1‑month plan, no contract)
See full deal
🛈 No annual price rises
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £16 a month (1‑month contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £16 a month (1‑month contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £25 £9.99 a month for 6 months, then £25 (1‑month plan, no contract)
See full deal
Their £12 SIM with 120GB is our next favourite this October
just
£12
a month
✔ Unlimited mins and 120GB data See full deal
at three.co.uk
(opens in new window)
If that's more data than you need, we'd say this is one of Three's best deals on SIM only this month too. It's a 12‑month plan, comes with 120GB data, unlimited minutes and texts for £12 a month:
Unlimited minutes + Unlimited texts + 120GB data (5G) = £18 £12 a month (12‑month contract)
See full deal
It does enough to get into our pick of Three'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. Here are other networks you can beat it on:
Unlimited minutes + Unlimited texts + 120GB data (5G) = £14 a month (12‑month contract)
See full deal
We also like their £8 for 40GB plan
just
£8
a month
✔ Unlimited mins and 40GB data See full deal
at three.co.uk
(opens in new window)
For less data to use each month, have a look at Three's 40GB SIM below at £8 a month, as it's another good deal. It's on a 12‑month plan and comes with 40GB data, unlimited minutes and texts:
Unlimited minutes + Unlimited texts + 40GB data (5G) = £16 £8 a month (12‑month contract)
See full deal
Compared to Three'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. See the networks with cheaper plans here:
Their 12GB for £6 SIM is another good option
just
£6
a month
✔ Unlimited mins and 12GB data See full deal
at three.co.uk
(opens in new window)
If you wouldn't get through that much data, another option for you on Three, is their 12‑month SIM below, which costs £6 a month for 12GB data and comes with unlimited minutes and texts:
Unlimited minutes + Unlimited texts + 12GB data (5G) = £6 a month (12‑month contract)
See full deal
If you compare prices against Three's competitors, there are actually none with 12GB data or more that beat them currently. See the nearest SIM only deals from other networks under the dropdown below:
Unlimited minutes + Unlimited texts + 15GB data (5G) = £2.78 a month for 3 months, then £6.95 (1‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 30GB data (5G) = £7 a month (1‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 21GB data (5G) = £7.90 a month (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + 30GB data (4G) = £8 a month (12‑month contract)
See full deal
🛈 Annual Price Increase: monthly plan increases annually on 1 April by £1.00
Unlimited minutes + Unlimited texts + 20GB data (5G) = £10 £8 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + 16GB data (5G) = £8 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + 25GB data (5G) = £1.99 a month for 3 months, then £10 (12‑month contract)
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Unlimited minutes + Unlimited texts + 12GB data (5G) = £11 £9.50 a month (12‑month contract)
See full deal
🛈 No annual price rise for Clubcard holders
Unlimited minutes + Unlimited texts + 30GB data (5G) = £9.90 a month (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + 25GB 60GB data (5G) = £10 a month (18‑month contract)
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Unlimited minutes + Unlimited texts + 25GB data (5G) = £10 a month (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + 25GB data (5G) = £16 £10 a month (12‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 20GB data (5G) = £10 a month (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + 15GB data (5G) = £10 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + 10GB 30GB data (5G) = £13 a month (1‑month contract)
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Unlimited minutes + Unlimited texts + 25GB data (5G) = £16 a month (24‑month contract)
See full deal
🛈 Prices rise each year on March 31st by £1.50
Unlimited minutes + Unlimited texts + 20GB data (5G) = £19 £17 a month (24‑month contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £12.50 a month for 1 month, then £25 (1‑month contract)
See full deal
🛈 Prices reduce over time!
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How Three compare on SIM only prices and benefits
We said in our full review of the Three network that our favourite thing about them is their fast 4G and 5G speeds as well as their encouraging 5G coverage.
On SIM only you can take a 1-month, 12-month or 24-month contract. Typically the longer the contract, the lower your monthly cost. But it’s always worth shopping around to find their best current deal.
Three’s “Lite” plans are much cheaper than the sorts of deals you’d get on other main networks. Three also have some premium plans with extra benefits baked in. You can take these on 12 or 24-month contracts.
All Three plans give you access to their handy Three+ rewards app. And you get EU and worldwide roaming passes included on their premium Value and Complete plans, as well as these other benefits.
Useful link: Read our full Three review
Other good things to know about Three’s SIM only plans
Three will send your SIM card within 3-5 working days. You’ll receive a package with every size of SIM in it, so you can fit your SIM into every phone. Three also offer eSIMs (see more info here).
You can return your SIM within 14 days to get a full refund if you’re not satisfied. Returning things you bought in a Three store is a bit more tricky, so read the full terms and conditions here to learn more.
To join on any Three SIM only contract you’ll have to pass a credit check. If you were rejected for a contract on Three then you can either take a monthly PAYG bundle or top up with credit and pay as you go.
If you want to keep your number when switching to Three from another network, you can do so by requesting a PAC from your old provider and giving it to Three at any time. Here’s their guide on how to do this.
Useful link: Compare all Three SIMs