Registration and login help

If you’ve received an email or SMS from us letting you know about a recent system update, you now need to re-register your My3 account. You will not be able to log in using your previous details. Here’s how to re-register: 

1. When on the login or registration page on either three.co.uk or the Three app, click Register. Or tap the Register button below
   
2. Enter your Three number followed by a password of your choice
   
3. Enter the email address you previously registered with us – this will be the same as the email address we recently used to get in touch with you 
   
4. We’ll then send you a validation email – don’t forget to check your junk mail folder. Click the link to validate your email address 

If you’ve got multiple numbers associated with your account, contact us to re-register for My3. 

If you’re registering for the first time, you’ll need your Three mobile number – which can be found on your bill or SIM packaging. 

1. Enter your Three number followed by a password of your choice 
   
2. Enter a valid email address so that we can send you a verification link – this will also be used if you need to reset your password in the future 
   
3. We’ll then send you a validation email – don’t forget to check your junk mail folder. Click the link to validate your email address, and that’s it