Best Three SIM offers: 60GB for £8, 80GB for £10
The retailers featured on this page may compensate us when our readers follow links to their websites and make a purchase. More
We look at how Three compare on price this month against their competitors on SIM only and find their best offers. Last updated: 17th April 2025.
Three's best SIM only deals
The best value SIM only deal on Three this month
just
£8
a month
✔ Unlimited mins and 60GB data See full deal
at three.co.uk
(opens in new window)
Out of all the SIM only plans available this April on Three, we'd say their best value deal is their discounted 12‑month SIM below, which gets you 60GB data, plus unlimited minutes and texts for £16 £8 a month:
Unlimited minutes + Unlimited texts + 25GB 60GB data (5G) = £16 £8 a month (12‑month contract)
See full deal
It’s a discount of £8 a month against the full price, adding up to a £96 saving over the 12 months.
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:
£10 for 80GB is Three's next best SIM deal in April
just
£10
a month
✔ Unlimited mins and 80GB data See full deal
at three.co.uk
(opens in new window)
For more monthly data, have a look at Three's discounted 80GB SIM below at £16 £10 a month, as it's another good deal. It's on a 12‑month plan and comes with 80GB data, unlimited minutes and texts:
Unlimited minutes + Unlimited texts + 25GB 80GB data (5G) = £16 £10 a month (12‑month contract)
See full deal
That discount will save you £6 a month, which adds up to £72 over the course of the 12‑month deal.
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:
Unlimited minutes + Unlimited texts + 80GB data (5G) = £8.95 a month (1‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 108GB data (5G) = £9 a month (12‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 120GB data (5G) = £12 a month (12‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 100GB data (5G) = £12 £10 a month for 15 months, then £12 (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + 70GB 100GB data (5G) = £10 a month (24‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 80GB data (5G) = £10 a month (1‑month plan, no contract)
See full deal
There's also a nice 250GB for £12 plan with them this month
just
£12
a month
✔ Unlimited mins and 250GB data See full deal
at three.co.uk
(opens in new window)
To get even more data, another option for you on Three is their discounted 12‑month SIM below, which costs £22 £12 a month for 250GB data and comes with unlimited minutes and texts:
Unlimited minutes + Unlimited texts + 250GB data (5G) = £22 £12 a month (12‑month contract)
See full deal
That’s £120 you’ll save over 12 months with the deal thanks to the £10 monthly discount.
There's not currently a better SIM only deal on the market than Three's one above if you want 250GB data or more. Here's the closest their competitors get for similar plans:
Unlimited minutes + Unlimited texts + 400GB data (5G) = £17 a month (12‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 250GB data (5G) = £13.95 a month (1‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 250GB data (5G) = £14 a month (1‑month contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £18 £9 a month for 6 months, then £18 (24‑month contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £20 £16 a month for 15 months, then £20 (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + 100GB 250GB data (5G) = £25 £16 a month (12‑month contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £25 £20 a month (24‑month contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £11.50 a month for 6 months, then £23 (24‑month contract)
See full deal
🛈 ASDA reserve the right to increase the cost of this plan annually with one month's notice
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £36 £24 a month (24‑month contract)
See full deal
🛈 Increased to: £25.50 on April 1 2026.
Increased to: £27.00 on April 1 2027
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £25 a month (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £25 a month (1‑month plan, no 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!
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £35 £25 a month (18‑month contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £27 a month (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £29 £27 a month for 12 months, then £29 (12‑month contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £29.90 a month (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £35 £30 a month (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £39 £31.20 a month (1‑month contract)
See full deal
Compare all SIM only plans
Compare deals from all networks
How Three's deals compare with other networks
Networks
Providers:
Plan
Data: (0MB+)
Minutes: (0+)
Thanks, we'll send that out now. Please check your inbox for our email.More about Three's SIM only plans
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