Important information:

To improve our service, we'll be updating our system between 18:00 Saturday 9 December, and 12:00 Sunday 10 December. You'll be unable to place any orders during this time.

SIM Only deals

Keep your current device and get a SIM on Three. Plans start from £9 a month, or try us with a free Pay As You Go SIM. And check out our Unlimited SIM Only deals.

Unlimited SIM Only deals

Go unlimited with Three. Take a look at our range of Unlimited data SIM Only deals.

Phone SIMs

From 1GB to Unlimited data SIMs, there’s something for everyone in our Pay Monthly plans.

Looking for a new SIM with no contract? Check out our Pay As You Go deals.

Get online with a Data SIM

Get your tablet or Mobile Broadband connected with our range of Data SIMs, from 1GB to Unlimited data.

Looking for business plans? Discover our business SIM deals now.

SIM Only deals

Take a look at our top SIM offers.

Christmas Sale - £22 a month

24 month SIM

  • Unlimited minutes
  • Unlimited texts

Christmas Sale - £15 a month

120GB data
24 month SIM

  • Unlimited minutes
  • Unlimited texts

Christmas Sale - £10 a month

24 month SIM

  • Unlimited minutes
  • Unlimited texts

Free Pay As You Go phone SIM

Top up for great rates and get even more with our Data Packs.

Already with us?

See our exclusive SIM Only deals for existing customers.

Why choose Three?

Frequently asked questions

A SIM Only contract is just that. No phone or tablet, just a SIM card with all the data, minutes and texts you need. Pick a Pay Monthly or Pay As You Go plan that suits you. We’ve got Pay Monthly phone contracts ranging from 1GB a month to Unlimited data SIM cards. You get extra flexibility with Pay Monthly, because you can join us on a 1, 12 or 24-month plan. And if you choose Pay As You Go there's no upfront cost.

A Data SIM works the same way as a phone SIM, but it will connect your tablet or other Mobile Broadband device to the internet through our network. We’ve got a whole host of Data SIM plans, from Unlimited Data SIM Only plans to Pay As You Go Data SIMs with no contract.

If you don't want a new phone, but your current contract is up, then SIM Only is perfect. You get extra flexibility with Pay Monthly, because you can join us on a 1, 12 or 24-month plan. And a huge range of data options, from 1GB to Unlimited data plans. And if you choose Pay As You Go there's no upfront cost. Simply send a text to switch to Three and keep your number.

Yes, you can. It’s easy to do it online, or even via text. Just let us know your PAC code from your previous provider. Find out all you need to know about switching to Three.

If you're currently using a Pay As You Go SIM, then you'll be able to leave at any time. If you're on one of our Pay Monthly SIM Only contracts, then you'll be able to cancel when that contract is up for renewal. The Pay Monthly SIM Only contracts last 1, 12 or 24 months.

Yes, with SIM Only you can still use all your favourite web messaging services, like WhatsApp and Facebook Messenger. Any data use will come out of your SIM plan allowance.

Yes, as long as you have a 5G device and you’re in a 5G area, our SIMs will have you covered. Take a look at our 5G coverage checker.

Yes, with a Three SIM you'll be able to use your device abroad. The process for activating Go Roam for your Three SIM differs slightly for Pay Monthly and Pay As You Go plans. You can find out more on our Go Roam page.

Best SIM Only deals

All our SIM plans include unlimited minutes and texts. And our Unlimited data plan gives you all the data you could ever need, with no limits or caps. Plus, with Go Roam, you unlock your UK allowance in 71 destinations.

5G SIMs at no extra cost

All our SIMs are 5G Ready. So, if you’re in a 5G area you can enjoy super-fast 5G with no speed limits and no data caps.

Network coverage

Our combined 3G and 4G network covers 99% of the UK outdoor population. And we’re currently dedicating more spectrum to our 5G network than any other UK mobile operator. Try us out with a 1-month SIM Only plan, or with our free Pay As You Go SIM.

Phones on Three

We've for a wide range of phones online and in store, available on both Pay As You Go and Pay Monthly contracts. From Apple's latest iPhone to the newest Samsung devices, as well as the latest from HTC, Sony, LG and Huawei and more.

Tablets on Three

From Apple iPad and Samsung Galaxy Tab, to the Huawei MediaPad, you can get your hands on the latest tablets at Three. And if you've already got a tablet you love, get a data SIM Only plan.