We’ve phased out our 3G network across most of the UK now.
So, to use our network, you need to use a device that’s 4G or 5G ready. And if you use your device for calls, it must support 4G Calling too. To check if your device is 4G or 5G ready or to find steps on activating 4G Calling, head to our device support page.

Free Pay As You Go SIM

Enjoy total flexibility with no commitment. Order your free SIM today and add a Data Pack for your minutes, texts, and data – they’re much better value than Top-Ups.

Get 50% cashback

For a limited time – get money back when you choose a new Auto-Renew Data Pack. Terms apply. [1]

Our data packs come with unlimited calls and texts with no contract tying you down. And you get inclusive roaming in over 70 destinations. Choose eSIM to get started today. Terms apply.

Up to 50% Cashback

Get more data for less with our auto-renew Data Packs

Data Packs are like top-ups, but you get more for your money. For the ultimate value, choose an Auto-Renew Data Pack - they give you our lowest prices for data, as well as unlimited minutes and texts. You’ll get a new allowance every month but you can cancel any time.

If you use Three Services outside of the UK you must first make a purchase associated with the SIM in the UK to ensure it is correctly provisioned on the Three Network.

Three gives you more

You get lots of great Pay As You Go benefits. Plus, you can get unlimited calls and texts when you choose one of our Data Packs.

How to get started with Pay As You Go

1. Get your free SIM

Add your SIM to basket and complete checkout. It should arrive in the post in 1 – 3 days.

2. Download the app

It’s the quickest way to set up your SIM and manage your account.

3. Get a Data Pack and save on auto-renew

Get started by adding data with a Data Pack. Save more with auto-renew and cancel at any time.

Exclusive extras

40GB for £15. When you auto-renew.

Go Roam

Use your UK allowances in over 70 destinations around the world at no extra cost. You can call, text and enjoy up to 30GB of data, depending on your Data Pack.

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

You can get a free SIM from your local Three Store to try our network on Pay As You Go. We recommend getting a Data Pack with your SIM – it gives you more value than top-up credit, plus unlimited calls and texts.

Why choose Three?

Ookla® Speedtest Intelligence® data, 1H 2025. All rights reserved.

Visit speedtest.net/awards/fastest-5G to find out more.

Terms and conditions