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Three SIM only deals for August: 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: 4th August 2022.

Three's best SIM only deals

This month's overall best Three SIM only deal

Three SIM card
30GB data
a month

12-month dealGet this deal

(opens in new window)

Three's best SIM only plan this August in our opinion is their £9, 12‑month deal below, which comes with 30GB data, plus unlimited minutes and texts for your money:

Three's is actually the best-priced SIM only deal in the UK at the moment for 30GB data or more. No other providers can beat it for monthly cost. Here's each network's nearest plan:

Their £8 SIM with 30GB is our next favourite this August

Three SIM card
30GB data
a month

24-month dealGet this deal

(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 24‑month plan, comes with 30GB data, unlimited minutes and texts for £8 a month:

You can't actually currently beat Three's prices there for a SIM only deal with 30GB data or more on any other provider. Here are the closest alternatives each network is currently offering:

We also like their £16 for unlimited data plan

Three SIM card
Unlimited data
a month

12-month dealGet this deal

(opens in new window)

If you think you'll need even more data, have a look at Three's unlimited data SIM below at £16 a month, as it's another good deal. It's on a 12‑month plan and comes with unlimited data, unlimited minutes and texts:

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 100GB for £12 SIM is another good option

Three SIM card
100GB data
a month

12-month dealGet this deal

(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 £12 a month for 100GB data and comes with unlimited minutes and texts:

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. Here's which other networks can beat it:

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

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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

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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