Three app
- Go to the Account tab
- Then Account settings
- Tap Link another account or number and follow the on-screen instructions
Registration and login help
For everything you need to know about registering for My3 and the Three app.
If you’re a business customer, please go to our business registration and log in page.
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 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.
Registering for the first time
My3
- Go to three.co.uk/customer-login
- Tap the Register tab
- Enter your email address
- Create a secure password and confirm
- We’ll send a verification email to the address entered
- Click Verify your email
If you haven’t received your verification email, please check your junk or spam folder. If it’s not there either, please get in touch with us.
Adding your account or number
Once you’ve registered, you’re ready to add your account.
- Log in using your email address and password
- Select your account type – personal or business
- Enter a Three number you’d like to add, and tap Continue
- We’ll send you a One Time Passcode (OTP) by text
- Enter the OTP when prompted
- You’ll then see your account on your dashboard.
If you’ve not received a text with your OTP, please check the mobile number shown on screen. If it’s correct, tap Resend OTP to retry.
If you’re still having trouble, please contact us for more help.
Linking additional accounts or numbers
If you’ve got more than one account or number with us, you can manage them all with one login. Here’s how:
Three app
- Log into the Three app
- Go to the Account tab
- Then Account settings
- Tap Link another account or number
- Log into your account again, when prompted
- Select the type of account you’d like to link – personal or business
- Enter a Three number you’d like to link, and tap Continue
- We’ll send you a One Time Passcode (OTP) by text
- The account you’ve added will then appear in the Select account list
My3
- Go to three.co.uk/customer-login
- Go to More actions
- Select Link another account or number
- Select your account type – personal or business
- Enter a Three number you’d like to link, and tap Continue
- We’ll send you a One Time Passcode (OTP) by text
- The account you’ve added will then appear in Manage a different account
If you’ve not received a text with your OTP, please check the mobile number shown on screen. If it’s correct, you can tap Resend OTP.
If you’re still having trouble, please contact us for more help.
FAQs
If your verification email hasn’t arrived, please check your junk or spam folder. If it’s not there either, please get in touch with us.
Please check the mobile number shown on screen. If it’s correct, tap Resend OTP to retry.
If you’re still having trouble, please contact us for more help.
My3
- Go to More actions
- Then select Link another account or number and follow the on-screen steps
No, you can’t use My3 or the Three app to link an account or number that’s already been registered. Please contact us instead.
No. For security reasons, you can only link accounts or numbers that are in the same name with a matching address.
No, linking your accounts simply lets you view them all using one set of login details. Doing this doesn’t affect your bills in any way – they’ll stay the same.
Yes, you can. Just follow the steps above for linking additional accounts or numbers.
Yes. The account holder can set this up for you using the Three app or by logging into their My3 account:
My3
- Go to More actions
- Tap Manage account user
- Then select Replace contact and follow the on-screen steps
Three app
- Go to the Account tab
- Tap Account settings
- Then go to Account users
- Tap Replace contact and follow the on-screen instructions
Once you’ve been added as a user by the account holder, you can register using the steps above.
If you’re a Sole Trader, you can link your business account to your personal account. If you’re having trouble doing this or are part of a larger business, please get in touch with our business care team.
If you have more than one number associated with your account, you can enter any of them to register. If you’re the account holder, you’ll see all numbers associated with your account using one set of login details.
If you’ve got Home Broadband with us, you can find your number in the Three app by tapping Broadband in the menu at the top of the screen when connected to your router.
For more detailed, device-specific information, including Mobile Broadband devices, check our device support pages.
Yes, if you’re the account holder, you can log into either the Three app or My3 and register them as an account user. This gives them view-only access to their account – perfect for keeping track of their usage, updating their personal details, or topping up if they’re on Pay As You Go.
Here’s how:
My3
- Go to More actions
- Tap Manage account user
- Then select Replace contact and follow the on-screen steps
Three app
- Go to the Account tab
- Tap Account settings
- Then go to Account users
- Tap Replace contact and follow the on-screen instructions
Once you’ve been added as a user by the account holder, you can register using the steps above.
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