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Three SIM only deals for February: 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: 26th February 2024.

Three's best SIM only deals

The best value SIM only deal on Three this month

Three SIM only deal
SIM only
just
£12
a month
🛈 Monthly price will increase each April by the Consumer Price Index rate of inflation published in December + 3.9%

Unlimited mins and 120GB data See full deal

at three.co.uk
(opens in new window)

Out of all the SIM only plans available this February on Three, we'd say their best value deal is their 12‑month SIM below, which gets you 120GB data, plus unlimited minutes and texts for £12 a month:

Three logo

Unlimited minutes + Unlimited texts + 0MB 120GB data (5G) = £18 £12 a month (12‑month contract)
See full deal

🛈 Monthly price will increase each April by the Consumer Price Index rate of inflation published in December + 3.9%

Even though it's in our pick of Three's best SIM only deals, you can actually beat it on price with other providers, including ones that also use the Three network. See lower-priced networks' deals here:

£8 for 25GB is Three's next best SIM deal in February

Three SIM only deal
SIM only
just
£8
a month
🛈 Monthly price will increase each April by the Consumer Price Index rate of inflation published in December + 3.9%

Unlimited mins and 25GB data See full deal

at three.co.uk
(opens in new window)

If you need less data, have a look at Three's 25GB SIM below at £8 a month, as it's another good deal. It's on a 12‑month plan and comes with 25GB data, unlimited minutes and texts:

Three logo

Unlimited minutes + Unlimited texts + 0MB 25GB data (5G) = £16 £8 a month (12‑month contract)
See full deal

🛈 Monthly price will increase each April by the Consumer Price Index rate of inflation published in December + 3.9%

While this is a good enough deal to make it into the best of Three's SIMs, you can beat it for price (even if you definitely want a provider that uses the Three network). Here are other networks you can beat it on:

There's also a nice 8GB for £7 plan with them this month

Three SIM only deal
SIM only
just
£7
a month
🛈 Monthly price will increase each April by the Consumer Price Index rate of inflation published in December + 3.9%

Unlimited mins and 8GB data See full deal

at three.co.uk
(opens in new window)

For a smaller amount of data, another option for you on Three, is their 12‑month SIM below, which costs £7 a month for 8GB data and comes with unlimited minutes and texts:

Three logo

Unlimited minutes + Unlimited texts + 0MB 8GB data (5G) = £0 £7 a month (12‑month contract)
See full deal

🛈 Monthly price will increase each April by the Consumer Price Index rate of inflation published in December + 3.9%

It's a good enough deal to get into Three'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 the networks with cheaper plans here:

Or their £5 for 3GB SIM plan is worth a look too

Three SIM only deal
SIM only
just
£5
a month
🛈 Monthly price will increase each April by the Consumer Price Index rate of inflation published in December + 3.9%

Unlimited mins and 3GB data See full deal

at three.co.uk
(opens in new window)

If you don't want so much data, Three have got a £5 deal on SIM only we think's worth looking at. It gets you 3GB data, unlimited minutes and texts and it's a 12‑month plan:

Three logo

Unlimited minutes + Unlimited texts + 0MB 3GB data (5G) = £0 £5 a month (12‑month contract)
See full deal

🛈 Monthly price will increase each April by the Consumer Price Index rate of inflation published in December + 3.9%

It might not be the lowest-cost SIM only deal with 3GB data or more on the entire market but if you're sure you need a SIM using the Three network, it is the best-priced. Here's which other networks can beat it:

Three are also offering unlimited data for £20 on SIM only

Three SIM only deal
SIM only
just
£20
a month
🛈 Monthly price will increase each April by the Consumer Price Index rate of inflation published in December + 3.9%

Unlimited mins and unlimited data See full deal

at three.co.uk
(opens in new window)

If you want even more data, we think this unlimited data is one of the best SIM only plans on Three too. It's on a 24‑month deal, comes with unlimited minutes and texts - all for £20 a month:

Three logo

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £22 £20 a month (24‑month contract)
See full deal

🛈 Monthly price will increase each April by the Consumer Price Index rate of inflation published in December + 3.9%

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. See where you can get it for less here:

Compare all SIM only plans

Compare deals from all networks

How Three's deals compare with other networks

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More about Three's SIM only plans

How Three compare on SIM only prices and benefits

Ratings stars with the Three logo

We go over their network and benefitsRead our full review

at simsherpa.com
(opens in new window)

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 network map screenshot

Check signal where you use your phoneCheck your signal

at three.co.uk
(opens in new window)

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

Other Three guides