Registration and login help

Registering for the first time? You’ll need your Three number and a valid email address to hand. 

You can find your Three number on your order confirmation, welcome emails, and bills. 

Got a Home Broadband device? You can find your number in the Three app by selecting Broadband from the menu at the top of the screen when connected to your router. 

For more detailed device specific information visit our Device Support pages.

If you want to manage your accounts and numbers with one email address, give us a call to get set up.

Not used the Three app or My3 before? Here’s how to get started:

1. Go to three.co.uk and tap Login/Register or tap the Register button below
2. Enter your Three number
3. Enter the email address used when you bought your SIM or device. This will be the email address used if you need to reset your password in the future.
4. Choose a secure password and tap Register
5. We’ll email you a verification link – tap it to validate your email address.

1. Download the Three app and enter your Three number
2. Tap Go to Account then Register
3. Enter your Three number and the email address you used when buying your SIM or device. This will be the email address we use if you need to reset your password in the future.
4. Enter a secure password
5. We’ll then email you a verification link – tap it to validate your email address.

We updated some of our systems in 2023 and you may have received an email or text asking you to re-register your My3 account.

If you’ve not re-registered yet, here’s how:

1. Go to three.co.uk and tap Login/Register. Or tap the Register button below.
2. Follow the on-screen steps to enter your Three number, email address, and a password of your choice. Remember to use the email address you previously registered with us – it’ll be the one we used to get in touch with you about the update. And it’ll be the one we use if you need to reset your password in the future.
3. We’ll email you a verification link – tap it to validate your email address