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Three SIM only deals for December: 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: 1st December 2022.

Three's best SIM only deals

This month's best SIM only deal on Three

Three SIM card
Unlimited data
a month

12-month dealGet this deal

(opens in new window)

Out of all the SIM only plans available this December on Three, we'd say their best value deal is their 12‑month SIM below, which gets you unlimited data, plus unlimited minutes and texts for £16 a month:

It might be one of Three'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:

Three are also offering 100GB for £10 on SIM only

Three SIM card
100GB data
a month

12-month dealGet this deal

(opens in new window)

For a smaller amount of data, another good deal on Three at the moment is their £10 SIM only plan here, which includes 100GB data instead, plus unlimited minutes and texts:

This is good for Three 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:

They've also got a 20GB for £7 SIM plan at the moment

Three SIM card
20GB data
a month

12-month dealGet this deal

(opens in new window)

If you don't want so much data, our next best pick of Three SIM only plans is their 12‑month £7 deal below, which gets you 20GB data and unlimited minutes and texts:

Three have actually got the best price in the UK at the moment for a SIM only deal 20GB data or more. If you want to see the plans other networks this beats, use the dropdown below:

Three's £6 for 8GB is our next best choice now

Three SIM card
8GB data
a month

12-month dealGet this deal

(opens in new window)

For people who don't need that much data, Three are also offering this £6 SIM, which includes 8GB data, unlimited minutes and texts on a 12‑month plan. It's another of their best deals:

That's actually the best price for a SIM only deal with 8GB data or more in the UK at the moment - so credit to Three. Use the dropdown below to see other networks' closest plans:

Their £9 SIM with 30GB is our next favourite this December

Three SIM card
30GB data
a month

12-month dealGet this deal

(opens in new window)

For even more data, you might like the £9 SIM only deal running on Three at the moment. It's a 12‑month plan, which comes with 30GB data, unlimited minutes and texts too:

While it's good enough to be in our pick of Three's best SIM only deals, other providers do still have similar plans for less, even ones that also use the Three network. See lower-priced networks' deals here:

We also like their £8 for 30GB plan

Three SIM card
30GB data
a month

24-month dealGet this deal

(opens in new window)

For those with smaller data needs, we'd say this is one of Three's best deals on SIM only this month too. It's a 24‑month plan, comes with 30GB data, unlimited minutes and texts for £8 a month:

It's definitely one of Three'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. Here are other networks you can beat it on:

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's SIM only prices and benefits compare

Ratings stars with the Three logo

We review Three's network in fullRead our full review

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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.

In terms of price, they’re the cheapest of the main networks (EE, Vodafone, O2, Three) and are fairly cheap compared to all providers. Their best deals tend to be their hidden deals on 12-month contracts.

Nowadays, Three are fairly low frills for a main network. They don’t offer much extra outside of their new Three+ rewards app and there are a few discounts on additional plans added to your account.

Useful link: Read our full Three review

Useful information about Three’s SIM only deals

Three network map screenshot

Test all the places you'll goCheck your signal

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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).

Once your SIM arrives you’ll have 14 days to return it and get a full refund if you’re unhappy with it. There are some finickity rules about returning things bought in-store, so have a read of their terms and conditions for more information.

You’ll have to pass a credit check to get on a pay monthly SIM only plan with Three. If you’ve failed a credit check with Three you can take a monthly bundle or top up your SIM 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