Best Three SIM-only deals for June 2023
ANYONE in the market for a cheap SIM-only plan should head to the popular network Three, which has lots of incredible offers right now
You'll find 3 SIM-only deals to suit everyone, from the most data-hungry to the one-a-day texters.
- Three SIM deals -
We've found the best SIM-only deals available from one of the favourite UK providers.
So if you've already got a handset you love, you can save a bundle by taking the SIM-only route, which will set you up with minutes, texts and data for a monthly cost.
The SIM-only market is hugely competitive, with providers seeking to outdo each other with huge data offerings at low prices - and Three is no exception.
We've saved you the hassle of scrolling through the website and any third-party companies and picked out the best 3 SIM-only deals from the brand below.
This month there's even more reason to opt for Three, as they're offering the first three months half-price for all of their 24-month SIM-only plans.
OUR TOP PICK
We love this deal that gets you 250GB of data for just £25, coming with 12 months Paramount+ and nothing to pay for the first 3 months.
250GB Plus, £25 per month (3 months free & 12 months Paramount+) -
If you're debating a new handset check out our round-up of the best iPhone 13 deals or the rival best Samsung S22 deals available this month.
And for those finding money tight right now, we've also rounded up the best cheap iPhone SE deals, to suit a smaller budget.
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Here are our picks for the best 3 deals this month.
The best Three SIM-only deals this June
1. Unlimited data: £25 per month (3 months free)
If you want to surf with confidence, then this unlimited data plan will keep you scrolling for hours and save you plenty.
This is a 24-month plan on Three's network that works out at just £24 per month, one of the most affordable unlimited plans on the market.
But better yet, you will be able to enjoy 5G and no extra cost and unlimited minutes and texts too.
- Unlimited data | Unlimited calls and minutes | £25 per month | 24 months -
2. Unlimited Plus: £30 per month (3 months free)
This plan not only gets you an Unlimited Plus data plan but some added perks too - including 12 months of Paramount+ and 28 Daily Go Roam Passes.
This is a 24-month plan on Three's network and works out at just £5 more per month than the standard Unlimited SIM-only plan.
- Unlimited data | Unlimited calls and minutes | £30 | 24 months -
3. 250GB data: £20 per month (3 months free)
This 24-month plan offers a generous data allowance of 250GB and comes with unlimited minutes and texts as standard, and it is a steal at just £20 per month.
It's the perfect balance for data-hungry users that don't quite need an unlimited plan.
- 250GB data | Unlimited calls and minutes | £20 per month, 24 months -
4. 250GB Data: £16 per month (after £10 cashback)
Get more for your money with this huge data package for under £20 per month - and in a nice touch, there's a cashback incentive too.
This deal comes from Fonehouse and includes 250GB of data for just £16 per month.
There is also an automatic £10 cashback incentive too, so no need to remember to submit any claims forms.
- 250GB data | Unlimited calls and minutes | £16 per month (after £10 cashback) | 12 months -
5. 100GB data: £12 per month (after £36 cashback)
This deal is perfect if you need a large data package and offers a little cashback to sweeten the deal.
It is a short-term plan at just 12 months, but helps you to save over the year and comes with no long-term contract to tie you in.
The tariff is made so cheap by the £36 guaranteed cashback bringing the monthly cost down from £15 to just £12.
- 100GB data | Unlimited calls and minutes | £12 per month (after £36 cashback) | 12 months -
6. 120GB data: £16 per month (3 months free)
For data users who don't quite need unlimited data, 120GB is more than enough for all your streaming needs, especially at just £16 per month.
It is the perfect balance for those who need to be sure their data allowance will get them through the month but don't need to shell out for unlimited.
- 120GB | Unlimited calls and minutes | £16 per month | 24 months -
7. 100GB data: £15 per month (after £48 cashback)
This deal is pretty good before the cashback even comes into play as you can get 100GB of data for just £15 per month on a 12-month contract.
However, to sweeten the deal, third-party company Fonehouse is offering £48 automatic cashback, bringing the effective price down to just £15 per month.
- 100GB data | Unlimited calls and minutes | £15 per month (after £48 cashback) | 12 months -
8. 25GB Plus: £19 per month (3 months free)
This is a great mid-range data package that comes with some plus festures. 25GB is more than enough for the average user to get month to month without running empty.
And it comes with 12 months Paramount+ inclusive and 28 Daily Go Roam Passes, so you'll get more for your money.
- 25GB Plus | Unlimited calls and minutes | £19 per month | 24 months -
9. 30GB data: £10 per month
If you don't need that much data, then this smaller 30GB plan is a great alternative.
This is a great £10 per month deal for 30GB data, which for most people is plenty of data - saving you money and giving you plenty of scrolling capability.
- 30GB data | Unlimited calls and minutes | £10 per month | 12 months -
10. 25GB data: £14 per month (3 months free)
This is a perfect option for those of you that don't need a huge data plan but want to be sure you can scroll and stream till the end of the month.
You'll get 25GB for just £16 per month and it includes unlimited minutes and texts too.
25GB data | Unlimited calls and minutes | £14 per month | 24 months -
11. 12GB data: £9 per month
This is the goldilocks of SIM-only deals, not too much or too little data for a reasonable price of £9 per month.
For people who aren't big data users but need more than small 1GB or 2GB options, this affordable 12-month plan might be just right.
- 12GB data | Unlimited calls and minutes | £9 | 12 months -
12. 8GB data: £7 per month (after £24 cashback)
If your data needs are minimal then take this SIM-only deal into consideration, you can grab 1GB or 2GB SIMs but you might end up paying more.
Yes, 8GB isn't much for most people, but if that's enough for you we are sure you'll like that super-low monthly cost of £7 or £8 before cashback.
- 8GB data | Unlimited calls and minutes | £7 (after £24 cashback) | 24 months -
13. 12GB data: £12 per month (3 months free)
This is one of the cheapest deals we've seen from Three and it still gives you a pretty generous data allowance of 12GB.
It is great for anyone that doesn't eat up their data and just needs enough to see them through the month.
- 12GB data | Unlimited calls and minutes | £12 per month | 24 months -
14. 4GB data: £9 per month (3 months free)
This 24-month plan may be small at just 4GB but that is more than enough for economical users, and it still comes with unlimited minutes and texts as standard, and it is a steal at just £9.
It's the perfect balance for data-hungry users that don't quite need an unlimited plan.
- 4GB data | Unlimited calls and minutes | £9 per month, 24 months -
How do I switch to Three and can I keep my number?
As with all mobile networks, you'll need a PAC code to switch over to Three and keep your current number.
Getting your PAC code is quick and completely free, it's as simple as texting PAC to 65075 from the number you want to keep.
The code gives permission to Three to bring your mobile number from your old provider over to the Three network.
Is Three a good network?
Three is one of the cheapest of the major network providers and is up there with the most reliable.
You can check your location on the before buying to check the service in your area.
Three customers can connect to Virgin Media Wi-Fi hotspots on the London Underground for free.
Does Three have 5G?
Yes! Three boast the network as having one of the fastest 5G networks of all the major providers.
Three has a dedicated 140MHz spectrum to deliver its 5G service, with is 50MHz more than any other UK network operator - so you can be sure you'll have super fast coverage.
What is the best Three SIM-only deal?
Our favourite SIM-only deal from Three right now is without a doubt the .
It's perfect for data-hungry phone users who are into gaming or streaming content on the go.
We also like the unlimited plan from Buymobiles as this gives a shorter contract for just £16 per month, which could save you money in the long run.
If you like to stick with your contracts for longer, a 12-month option might not be for you as there is no guarantee you can renew it for such a low price.
How long is a SIM-only contract with Three?
Directly from Three, there are, well, three different contract durations for SIM plans.
Depending on your choice, you can either sign up to a 1-month, 12-month or 24-month package.
Keep in mind though: the shorter the contract, the more you can expect to pay.
So while a 24-month 30GB plan costs £14 a month, the equivalent month-long plan costs £24 a month.
That's quite the increase, but is hardly a surprise: Three simply wants your business for as long as possible.
Other third-party providers often do 12 or 24-month contracts - omitting the one-month option.
Why choose a SIM-only deal?
SIM-only plans are a great choice if you've already got a phone that's been paid for.
Without that expenditure to factor in, you can easily keep your phone outgoings relatively low each month with a SIM-only plan.
You won't necessarily need to commit long-term: most providers offer pay-as-you-go SIM plans that you can use on a rolling basis.
So if you're waiting for the release of the next big flagship phone, a SIM-only plan is a great temporary option.
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