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Registration and login help

For everything you need to know about registering for and logging into My3 and the Three app.

Before you start

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 or Mobile Broadband device? You can also find your Three number on your router dashboard. 

To access your dashboard, connect a device and enter the following default IP address for your router into a browser address bar: 

  • Zyxel – 192.168.1.1
  • ZTE – 192.168.0.1

Got more than one number?

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

Registering for the first time

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

Registering for My3:

  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. Fill in your details and choose a secure password
  5. We’ll email you a verification link – tap it to validate your email address.

Registering for the Three app: 

  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.

Re-registering after our system update

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

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