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Are you on the hunt for a cracking SIM only deal? Look no further than Three. With generous data allowances, unlimited minutes and texts, and plenty of juicy extras, Three's SIM only plans offer incredible value for money. Let's compare the best Three SIM only deals available right now.

Why Should I Choose a Three SIM Only Deal?

There are loads of reasons to consider a Three SIM only plan, including:

  • Unlimited data options: Three is famous for its 'all-you-can-eat' unlimited data plans, perfect for data-hungry users who love to stream, scroll and download on the go.
  • 5G at no extra cost: All Three SIM only plans come 5G-ready as standard, so you can enjoy lightning-fast speeds without paying a premium (provided you have a 5G phone and coverage in your area).
  • Go Roam Around the World: Three's Go Roam lets you use your UK allowance in 71 destinations worldwide at no extra cost. That's more than any other UK network!
  • Endless calls and texts: All Three SIM only plans come with unlimited UK calls and texts, so you can chat and message to your heart's content without worrying about nasty bill shock.
  • Three Reward programmes: Offers exclusive discounts and freebies from top brands like Greggs, Cineworld, and Deliveroo. Who doesn't love a good perk?
Why Should I Choose a Three SIM Only Deal

What SIM Only Deals Does Three Offer?

Now, let's take a closer look at some of Three's most popular SIM only deals:

Three SIM Only Lite Plan

Three's Lite plan is perfect for those who want a simple, no-frills SIM only deal. Here's what you can expect:

  • Affordable monthly price: Lite plans start at just £5 per month, making them one of the cheapest options on the market.
  • Essential allowances: You'll get a basic allowance of data (usually 1-2GB), plus unlimited UK minutes and texts.
  • Short-term commitment: Lite plans are available on a 1-month rolling basis, so you're not tied into a long contract.
  • 5G at no extra cost: All Three SIM plans, including Lite, come 5G-ready as standard. So as long as you have a 5G phone and coverage, you can enjoy superfast speeds.
  • Go Roam in Europe: Use your UK allowances in 48 European destinations at no extra cost.

The Lite plan is best for light users who mainly use their phone for calls, texts and a bit of browsing or social media. If you're looking for a cheap, flexible SIM only deal, Lite could be the one for you.

Three SIM Only Value Plan

Three's Value plans offer a step up from Lite, with more generous allowances and a few extra perks:

  • Bigger data allowances: Value plans come with data allowances ranging from 4GB to 12GB per month, so you can browse, stream and scroll to your heart's content.
  • Unlimited UK minutes and texts: Like Lite, Value plans include unlimited calls and texts to standard UK numbers.
  • Longer-term contracts available: You can choose a Value plan on a 1-month, 12-month or 24-month basis, giving you more flexibility.
  • Go Roam Around the World: Use your UK allowances in 71 destinations worldwide at no extra cost, including the USA, Australia and more.
  • Tethering included: Value plans let you use your data allowance for tethering (using your phone as a mobile hotspot), so you can get your other devices online too.

The Value plan is a great all-rounder, suitable for most average users who need a decent chunk of data each month. Plus, with Go Roam Around the World, it's perfect for travellers too.

Three SIM Only Complete Plan

If you want the ultimate SIM only experience, Three's Complete plans have got you covered:

Unlimited data: The standout feature of Complete plans is unlimited data, so you can stream, browse and download to your heart's content without ever worrying about exceeding your allowance.

  • Unlimited UK minutes and texts: As with all Three SIM plans, you'll get unlimited calls and texts to standard UK numbers.
  • Long-term value: Complete plans offer the best value on 12-month and 24-month contracts, so you can enjoy unlimited data for longer.
  • Go Binge included: With Go Binge, you can stream endlessly from Netflix, Apple Music, Snapchat, Soundcloud, Deezer and TVPlayer without eating into your data allowance.
  • Go Roam Around the World: Use your unlimited allowances in 71 destinations worldwide at no extra cost.
  • Personal Hotspot included: Complete plans let you tether your phone and use all that unlimited data to get your other devices online too.
  • Cheap international calls: Many Complete plans give you thousands of minutes to call abroad from the UK, as well as discounted rates to other international numbers.

Complete plans are the ultimate choice for data-hungry users who want endless streaming, scrolling and roaming freedom. With bonuses like Go Binge and cheap international calls thrown in too, they offer unbeatable value for heavy users.

What SIM Only Deals Does Three Offer

So, which Three SIM only plan is right for you? It all depends on your usage habits and budget:

  • Light users who just need the basics should go for a Lite plan.
  • Average users who want a healthy data allowance and some extra perks would suit a Value plan.
  • And heavy users who want ultimate freedom and endless data should choose a Complete plan.

Whichever you choose, you'll get the excellent coverage, speed and reliability that Three is known for - not to mention a whole host of rewards and savings through the Three+ app.

Compare 5G SIM Only Deals

5G SIM only deals enable users to access a new SIM card for their 5G-compatible devices, providing data, minutes, and texts without the need to purchase a new phone.

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Three SIM Only Price Comparison

Now we've seen some of Three's standout SIM only deals, let's see how they stack up on price:

Data Allowance Monthly Cost Lite Monthly Cost Value Monthly Cost Complete Contract Length
4GB £13 £18 £23 12 months
12GB £14 £19 £24 12 months
25GB £16 £21 £26 12 months
Unlimited £27 £32 £37 12 months

Prices correct as of May 2024 for Three Lite, Value, Complete plan.

As you can see, Three's prices are pretty darn competitive across the board. Even their unlimited data plan comes in at a reasonable £16 per month - that's cheaper than some networks charge for a measly 20GB!

Of course, prices can vary depending on factors like contract length, credit check results and any special promotions that may be running. But in general, Three's SIM only deals are some of the best value around.

How Do I Choose the Right Three SIM Only Deal?

With so many great options to choose from, picking the perfect Three SIM only deal can feel a bit like finding a needle in a haystack. But don't fret - we've got some top tips to help you narrow it down:

  1. Assess your data needs: This is the big one - data is usually the most expensive part of a SIM only plan, so it's crucial to get it right. Take a look at your current monthly usage (check your provider's app or your phone settings) to get an idea of how much data you typically chomp through, then choose a plan with enough to cover your needs (plus a little buffer for safety).
  2. Think about contract length: Most of Three's SIM only deals come with a standard 12-month contract, but you can also opt for a 1-month rolling plan for a bit more flexibility. Just bear in mind that the shorter the contract, the higher the monthly price tends to be.
  3. Check the coverage: Three has excellent coverage across most of the UK, but it's always worth double-checking your specific area on their coverage map before signing up. You don't want to be stuck with patchy signal!
  4. Consider roaming: If you're a frequent flyer, Three's Go Roam Around the World perk is a game-changer. It lets you use your UK allowance in 71 worldwide destinations at no extra cost - perfect for keeping in touch on your travels.
  5. Look for added extras: From unlimited calls to family plans to exclusive rewards, Three has a ton of extra perks that can help you get even more bang for your buck. Think about which ones are most valuable to you and factor them into your decision.

How Do I Keep My Number When Switching to Three?

Want to keep your current number when you switch to a Three SIM only deal? No worries - it's a piece of cake:

  1. Request your PAC: First, you'll need to request a PAC (Porting Authorisation Code) from your current provider. You can do this by texting 'PAC' to 65075 from your current SIM, or by contacting your provider directly.
  2. Give your PAC to Three: When you sign up for your new Three SIM only deal, just give them your PAC at the same time. They'll take care of the rest.
  3. Wait for the switch: Your number will usually be transferred over to Three within one working day. In the meantime, keep your old SIM in your phone until the process is complete.

And that's all there is to it! With just a few simple steps, you can keep your beloved digits and start enjoying all the perks of your shiny new Three SIM only plan.

Compare SIM Only 12 Month Contract deals

This option is ideal if you already have a phone or prefer to acquire one separately.

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What if I Need More Data or Want to Change My Plan?

One of the beauties of a SIM only deal is the flexibility it offers. If you find yourself needing more data or wanting to switch to a different plan, it's usually a lot easier (and cheaper) than with a traditional phone contract.

With Three, you've got a few options for changing your plan:

What if I Need More Data or Want to Change My Plan
  • Upgrade to a higher allowance: If you're on a 12-month plan, you can upgrade to a higher data allowance at any time by contacting Three or logging into your My3 account. Just bear in mind that you'll need to see out the rest of your current contract at the higher price.
  • Add a data boost: If you just need a bit of extra data to tide you over for the month, you can add a one-off data boost to your plan. Three offers boosts from 1GB to unlimited data, starting from just £5.
  • Change to a 1-month plan: If you're on a 12-month plan and want more flexibility, you can switch to a 1-month rolling contract by contacting Three. Just be aware that the monthly price will likely be a bit higher.

Of course, if you're happy with your current plan, you can just sit back and enjoy your delicious data without lifting a finger. That's the joy of SIM only!

Can I Use My Three SIM Only Plan Abroad While Roaming?

Absolutely! One of the biggest perks of a Three SIM only deal is the incredible roaming offer, Go Roam Around the World. This lets you use your full UK allowance (including unlimited data if you have it) in a whopping 71 destinations across the globe, at no extra cost:

  • Most of Europe
  • USA
  • Australia
  • New Zealand
  • Hong Kong
  • Brazil
  • Singapore ...and loads more. Basically, if you're jetting off on holiday or on a business trip, chances are you'll be covered by Go Roam.

To use Go Roam, just make sure roaming is enabled on your phone, then use it like you would at home. You'll get a text from Three when you arrive in a Go Roam destination to let you know the service has kicked in.

It's worth noting that there are a few fair usage limits in place to keep things running smoothly. In Europe, you can use up to 12GB of data per month at no extra cost (which is still a heck of a lot). In non-European destinations, it's 12GB or 5,000 texts and 3,000 minutes. If you go over these limits, you'll be charged Three's standard roaming rates.

But for most people, Go Roam is more than enough to keep you connected on your travels without the stress of scary bills when you get home. Just another reason to love Three SIM only!

What's the Coverage and Speed Like on Three?

When it comes to coverage and speed, Three is up there with the best of 'em. Their 4G network covers a whopping 99% of the UK population, so you'll rarely be without a signal. And with an average download speed of around 20Mbps, you can stream, scroll and download to your heart's content.

But the real game-changer is Three's 5G network. They were the first UK network to offer 5G all the way back in 2019, and they've been expanding their coverage ever since. As of June 2024, Three's 5G network is available in over 300 towns and cities across the UK - that's more than any other network.

If you're lucky enough to live or work in a 5G area and have a 5G-ready phone, you can expect average speeds of around 200Mbps - that's fast enough to download a whole HD movie in under a minute! And the best bit? 5G comes included as standard on all Three SIM only plans, at no extra cost.

Of course, actual speeds will depend on things like your location, device and network congestion. But in general, Three's network is fast, reliable and always getting better. You can check their coverage map to see what kind of speeds you can expect in your area.

What Other Perks and Benefits Does Three Offer?

As if unlimited data, worldwide roaming and 5G speeds weren't enough, Three also has a ton of extra perks and benefits to make your SIM only deal even sweeter:

  • Unlimited calls and texts: All Three SIM only plans come with unlimited UK calls and texts as standard, so you can chat and message to your heart's content.
  • Go Binge: Three's Go Binge perk lets you stream Netflix, Apple Music, Snapchat, Soundcloud, TVPlayer and Deezer infinitely without using up your data allowance. Perfect for binge-watchers and music lovers!
  • Three rewards app: Three's rewards app, gives you exclusive offers and discounts from top brands like Greggs, Cineworld, Deliveroo and more. Just flash your app in-store or apply the discount code online to start saving.
  • Free 0800 numbers: Most networks charge for calling 0800 and 0808 numbers, but with Three they're totally free. That's handy for calling banks, utilities and customer service lines without racking up big charges.
  • Family plans: Got a few SIM only-ers in the family? Three lets you add up to 4 additional SIMs to your plan at a discount, all while keeping your individual allowances. Handy for keeping the whole brood connected for less.
  • Personal Hotspot: All Three SIM only plans let you tether your phone as a personal hotspot, so you can share your data with other devices like tablets and laptops. Perfect for working on the go or streaming on a bigger screen.

Of course, these are just the tip of the iceberg - Three is always coming out with new perks and benefits to keep their customers happy. Keep an eye on their website and app for the latest deals and offers.

How Does Three Compare to Other Networks?

Three may be flying high, but they're not the only kid on the block when it comes to great SIM only deals. Let's see how they stack up against some of the other big players:

Network Unlimited Data Price 5G Included? Roaming Destinations Perks
Three £27 Yes 71 Three Reward+
EE £35 Yes 48 Apple Music, BT Sport
O2 £36 No 75 O2 Priority
Vodafone £30 Yes 51 VeryMe Rewards
How Does Three Compare to Other Networks

As you can see, Three blows the competition out of the water when it comes to SIM only value. Their unlimited data plan is less than half the price of EE and O2's offering, while still including 5G and a world-beating roaming offer. Other networks may have some flashy perks like Apple Music or BT Sport, but Three's Go Binge and rewards are nothing to sniff at either.

Of course, there are other factors to consider when choosing a network, like coverage, speed and customer service. But when it comes to sheer SIM only value, Three is pretty hard to beat.

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How Do I Get a Three SIM Only Deal?

Ready to join the Three family? Getting your hands on a SIM only deal is easy:

  1. Choose your plan: Head to Three's website or pop into a Three store and take your pick from their range of SIM only deals. Whether you're after a small data plan or an unlimited beast, there's something for everyone.
  2. Check your coverage: Before you hit 'buy', it's always a good idea to check Three's coverage in your area to make sure you'll get good signal. You can do this with their online coverage checker.
  3. Order your SIM: Once you've picked your plan and checked your coverage, just click 'buy' or chat to a Three advisor in-store. They'll take a few details like your name, address and payment info, then get your SIM ordered and on its way to you.
  4. Activate your SIM: When your SIM arrives (usually within a couple of days), just pop it into your phone and follow the activation instructions. If you're transferring your number from another network, you'll need to give Three your PAC code at this stage too.
  5. Start enjoying your plan: Once your SIM is activated and you've popped it in your phone, you're good to go! Download Three's app to keep track of your usage, manage your account and snap up rewards on the go.

And that's all there is to it! With a Three SIM only deal, you can be up and running with sweet data, unlimited calls and all those juicy perks in no time. So what are you waiting for? Head to Three and start comparing deals today!

Three SIM Only Deals FAQ's

No, Three SIM only deals do not come with a new phone. SIM only plans provide you with a SIM card that you can use in your existing mobile phone or a phone you purchase separately.

Three offers a range of SIM only contract lengths, including 1-month, 12-month, and 24-month plans. The length of your contract will depend on the specific SIM plan you choose.

The main difference is that Three SIM only deals do not include a new phone, while pay monthly phone contracts bundle a new device with your monthly service plan. SIM only deals tend to be cheaper and more flexible than monthly phone contracts.

Yes, Three offers unlimited data SIM plans, which give you endless data for the full length of your plan. This is great for heavy data users who stream a lot of music, video, and more.

Three SIM only deals come with a whole host of benefits, including exclusive premieres, presale tickets to the UK's biggest festivals, free access to the London Underground WiFi, discounts on Uber Eats, and more.

Yes, you can keep your existing phone number when you switch to Three. You'll need to request a PAC (Porting Authorisation Code) from your current network, or a STAC (Service Termination Authorisation Code) if you're on pay-as-you-go.

Yes, Three offers 1-month SIM plans for ultimate flexibility. These plans let you change or cancel your service every 30 days without penalty.

Three offers loads of different data options on their SIM only plans, ranging from a few GB per month up to unlimited data. You can choose the data allowance that best suits your needs.

Yes, most Three SIM only plans come with Go Roam, which lets you use your UK allowance of data, minutes and texts in 71 destinations around the world at no extra cost. Some plans also include Go Roam Around the World, which covers an even wider range of countries.

Three's SIM only deals start from as little as £5 per month for 1GB data. However, prices and allowances change frequently, so it's always best to check Three's website for the most up-to-date offers.

No, there are no upfront costs for Three SIM only deals. You'll just pay your monthly fee for the length of your contract.

Yes, all Three SIM plans are 5G-ready at no extra cost. As long as you have a 5G-compatible phone and live in a 5G coverage area, you can enjoy superfast speeds on Three's 5G network.

Three offers great optional extras that you can add to your SIM only plan, such as Go Binge (unlimited streaming on popular apps), unlimited international calls, and more. You can see the full range of extras on Three's website.

Yes, you can change your Three SIM only plan at any time. If you want to upgrade to a plan with more data or add extras, you can do so easily online or via the Three app. Just bear in mind that you may need to pay more if you're increasing your allowance or adding extras mid-contract.

You can check your data usage and remaining allowances easily with the Three app or by logging into your My3 account online. There, you'll be able to see a breakdown of your usage and how much data, minutes and texts you have left for the month.

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Page last updated on: 09/05/2024

Page reviewed by: Shay Ramani

4000+ reviews