Get your free Pay As You Go SIM

1. Choose Pay As You Go

Select the Pay As You Go plan when you’re adding your SIM to the basket.

2. Click Continue

Select a great-value Data Pack that suits you. Or, hit Continue to get your free SIM.

3. Sit back and relax

Once you’ve filled in your details, then we’ll take it from there. Your free SIM will arrive at your door soon.

Data Packs give you more

Make your money go further. Choose your monthly data, and get unlimited minutes and texts included. And there's no commitment, so you can cancel anytime. Or auto-renew to keep it going.

Go Roam

Use your UK allowance in over 70 destinations. Call or text the UK, and use up to 12GB data/month at no extra cost.

Three+ Rewards

Enjoy exclusive offers from the brands you love, like Uber Eats and Cineworld. There’s more to life with Three+.

Go Unlimited

Treat yourself to our Unlimited Data Pack. Scroll, stream, and game without limits.

5G Ready

All our Pay As You Go SIMs get access to our 5G network at no extra cost.

Exclusive extras

40GB for £15. When you auto-renew.

Dial up your data with auto-renew

Unmissable Pay As You Go deal: Set your £10, £15 or £20 Data Pack to auto-renew and get extra Pay As You Go data on us. Extra data deal available on selected Data Packs when you set up auto-renew on My3 or the Three app, for up to 12 months. For more info, see our auto-renew terms.

Three+ rewards app

Download the Three+ rewards app today and enjoy exclusive offers from the brands you love. Whether you like eating out or catching a movie, there's more to life with Three+.

Pay As You Go phones

Looking for a brand new device on Pay As You Go? Check out our range and find your perfect fit.

Switch to Three

Moving your number over to Three has never been easier. You can switch in minutes, and keep your number with a simple text.

Here to help

We do everything we can to make topping up as quick and easy as possible. But if you're having any issues, we're here to help.

Frequently asked questions

Go to and select the Pay As You Go plan when adding to your basket.

No need to choose a Data Pack – skip this by hitting Continue to get your free SIM.

A Pay As You Go SIM card fits into your existing phone, and gives you access to our network. You aren’t tied into a contract, so you can add a Data Pack or top up your credit to use your phone as much or as little as you need to.


Your Pay As You Go SIM card gives you the flexibility of not being on a contract. Once you’ve inserted your SIM and downloaded our Three app, you can add a Data Pack which gives you a month’s worth of data, calls and texts. You have the option to renew each month without being tied into a 12, 24 or 36 month contract.

Once you’ve received your free SIM in the post, it’s easy to get set up in 3 simple steps.

  • Insert your SIM - you'll get a text with your new number.
  • Download the Three app and register your details.
  • Select your Data Pack or top up with credit, and you’re ready to go. If you set up auto-renew, which means your Data Pack will keep renewing, you’ll get extra data on us, every month.

Pay As You Go SIMs can expire. To keep your number active, you must use it for at least one chargeable activity every 180 days. A ‘chargeable activity’ is something like making a call, sending a text, using your data, or using an existing top-up credit or Data Pack allowance.

Yes, you can Go Roam in over 70 worldwide destinations with your Pay As You Go SIM. As long as you’ve activated and used your SIM in the UK before you go – like by sending a text, making a call, or using data – it will work when you’re abroad. Check where in the world you can Go Roam at no extra cost.

There are a few ways to top up. The easiest way is through the Three app, where you can also track your usage and manage your spend. But you can also:

  • Call 444 free using your Three SIM
  • Visit
  • Register your My3 account at

You get the best value with our Data Packs, which give you a month’s worth of calls, texts, and data. Or you can top up your credit, which gets used up gradually as you call, text, and go online.

Once you’ve received your free SIM, then you’ll need to download the Three app where you can register your SIM, and browse all the Data Packs we have on offer.

Why Three?

*Based on analysis by Ookla® of Speedtest Intelligence® data for Q1-Q2 2023. Ookla trademarks used under license and reprinted with permission.