Three Mobile SIM Deal
£8.00 a monthuntil April 2027then price rises every April in contract by £1.90
12 month contract
60 GBof 5G data
eSIM compatible
Look for
No price rise
in your resultsCompare Three Mobile SIM only deals
Whether you want a cheap SIM deal, unlimited data or anything in between, Three Mobile is a good choice, with fast 5G speeds at no extra cost.
List of SIM Only deals
Three Mobile SIM Deal
£10.00 a month
No contract
60 GBof 5G data
Three Mobile SIM Deal
£7.00 a monthuntil April 2027then price rises every April in contract by £1.90
12 month contract
30 GBof 5G data
eSIM compatibleThree Mobile SIM Deal
£13.50 a month
No contract
120 GBof 5G data
Three Mobile SIM Deal
£10.00 a monthuntil April 2027then price rises every April in contract by £1.90
12 month contract
80 GBof 5G data
eSIM compatibleThree Mobile SIM Deal
£20.00 a monthuntil April 2027then price rises every April in contract by £2.30
12 month contract
Unlimited5G data
eSIM compatibleThree Mobile SIM Deal
£12.00 a monthuntil April 2027then price rises every April in contract by £2.30
12 month contract
120 GBof 5G data
eSIM compatibleThree Mobile SIM Deal
£7.00 a monthuntil April 2027then price rises every April in contract by £1.90
12 month contract
15 GBof 5G data
eSIM compatibleThree Mobile SIM Deal
£15.00 a monthuntil April 2027then price rises every April in contract by £2.30
12 month contract
250 GBof 5G data
eSIM compatibleThree Mobile SIM Deal
£10.00 a monthuntil April 2027then price rises every April in contract by £1.90
24 month contract
60 GBof 5G data
eSIM compatible
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Our best Three Mobile SIMs
At Uswitch, we have a wide range of excellent SIM only deals on Three Mobile. You can sign up for as little as £5 a month and enjoy plenty of data, as well as unlimited calls and texts.
Three Mobile offers a huge variety of keenly-priced SIM only deals, ranging from 4GB a month, all the way up to unlimited data. With any of these deals, you’ll be able to enjoy 5G speeds at no extra cost, provided your handset is 5G-compatible. You can scroll to the top of this page and start comparing our best Three deals.
Should I choose a Three Mobile SIM?
Pros
5G speeds at no extra cost
Uswitch award winner for Best Network for Data 2022
SIM only deals from £5 a month
Includes Wi-Fi calling
Cons
Some plans charge a daily fee to roam in the EU
Prices may rise mid-contract in line with standard inflation increases
Is Three Mobile a good network?
Three Mobile has an excellent network. It’s one of the four big networks in the UK and has a network offering 99% 4G coverage. Even better, Three’s award-winning 5G network has now been rolled out across 62% of the UK and continues to grow constantly.
Three+ loyalty app
As a Three Mobile customer, you’ll get access to lots of great perks, including the Three+ loyalty app, which is full of excellent offers. Some offers you can enjoy currently include*:
- £5 off when you spend £10 at 100s of restaurants and takeaways
- £1 coffee across 100s of locations
- 2-for-£10 Cineworld tickets
*Any rewards currently available are subject to change
Three Mobile also has a helpful live chat customer support team. They’re available Monday-Friday, 8am-10pm and 9am-6pm at weekends.
Three customers on Pay Monthly plans can get in touch by calling 333, free from their mobile phone. Alternatively, you can call 0333 338 1001 from any other phone and will be charged at their standard rate.
What network does Three Mobile use?
Three Mobile is one of the four major mobile phone network providers in the UK, so it uses its own network. As such, it’s able to deliver 4G coverage across over 99% of the UK population. And its growing 5G network is now available across 62% of the UK.
Cheaper alternatives on the Three network
There are a few smaller providers that use Three’s network. These may offer lower prices and more flexible terms. A few examples include:
- iD Mobile – no annual price rises on SIM-only deals, with 30-day, 12-month and 24-month contracts available
- SMARTY – flexible one-month plans, EU roaming included (capped at 12GB) and no annual price rise
- Honest Mobile – an eco-friendly provider, you can find flexible plans, loyalty price reductions and five days of free EU roaming on each trip
Want a Three Mobile phone contract instead?
Take a look at our best pay monthly deals from Three Mobile today.
Can I use my Three Mobile SIM abroad?
Yes, you can use your Three Mobile SIM when travelling. However, depending on where you’re going, you’ll probably have to pay extra for the privilege of doing so. Three charges £2.75 a day for new customers for Go Roam in Europe and £8 a day for Go Roam Around the World. Prices may vary if you’re an existing Three customer.
Three is one of the many networks that have reintroduced EU roaming charges after Brexit, so you’ll be charged to use your Three SIM anywhere in the EU.
What happens at the end of a Three Mobile SIM only contract?
When you’re nearing the end of your Three Mobile contract, Three will contact you to let you know when you’ll be able to switch to another deal.
While you can continue on the same contract, it’s a good idea to shop around to see if there’s a better deal out there for you. Three Mobile will probably recommend a selection of deals. But since upgrade options direct from a network are usually on the pricier side, we’d recommend comparing SIM only deals to make sure you’re getting good value for money.
Can I keep my mobile phone number if I switch to a Three Mobile SIM only deal?
Yes, if you’re with a different provider, you’ll be able to transfer your number across to your new SIM only contract with Three Mobile. Once you’re ready to switch, all you need to do is text PAC to 65075 and you’ll receive a text with your PAC code.
When you receive your Three SIM through the post, you’ll find instructions on how to give your PAC code to your new network. Three will then transfer your number across to your new phone.
If you want any additional information, check out our guide on how to switch mobile phone providers.
Written by Nick Baker, Senior Editor
FAQs
Is Three’s 5G signal any good?
Three Mobile’s 5G speeds are among the fastest in the country. And, as it’s now been rolled out across 62% of the UK, so more and more people are able to enjoy fast 5G with Three.
How do I cancel my Three SIM only contract?
When you’re ready to cancel your Three SIM only contract, you can do so by phoning 333 from your Three SIM and notifying them that you want to cancel your contract. You will need to give 30 days’ notice and you may need to pay an early exit fee if your contract hasn’t expired.
Are Three SIM only deals cheaper than mobile phone contracts?
Yes, generally speaking, SIM only deals are almost always cheaper than mobile phone contracts because you’re only paying for the usage without having to pay off the cost of a handset as well. So if you’re happy to continue using your existing handset, you could save a lot of money by opting for a SIM only deal instead.
Do I need an unlocked phone to use a Three SIM?
Yes, if you’re putting your Three SIM into a handset that hasn’t been provided by Three, you’ll need to make sure that it’s unlocked (all phones sold since 2021 must be under Ofcom rules). If your mobile phone is locked, the easiest thing to do is call your current network to ask them to unlock it. To find out more, read our detailed guide on how to unlock your mobile phone.