Updating your personal details

It’s really important to keep all your details up to date. We can let you know about changes to your bill, and send you important updates about your account. Plus, we can let you know about our exclusive offers.

You can change your registered home and email address, your contact number, and your marketing preferences by following these steps.


  1. Visit www.three.co.uk/my3.
  2. Click on Login for business here and login using your email address and password.
  3. Click on the relevant option under  Your details and follow the on-screen instructions.

Changing your name

The only personal information you can’t change in the Three app or online is your name. If you need to change the name on your account because you’ve married, divorced, or changed your name by Deed Poll, contact us with proof of the name change.

All we need is one of the following pieces of information:

  • A copy of your marriage or civil partnership certificate. If you don’t have one, a copy of your passport and a recent utility bill is also acceptable.
  • A copy of a Deed Poll.
  • A copy of the decree absolute - if you’re divorced and want to use your maiden name.
  • Remember, we only need one of the above, and not all three!

One more thing. When you do write to us, remember to include a cover letter requesting that your name be changed.

Here’s the address:

Three Customer Services
PO Box 333
G2 9AG

Changing your email address

You can change your email address in the Three app or by visiting your account.

Remember that this email address will only apply to emails from Three. If you want to change your email for your Three+ account, you need to do this in the Settings tab of the Three+ app.

Changing other details on your account

Follow the links below for instructions on how to change other details on your account.

For anything else, including changing your number or the named owner of the account, contact us and we’ll be able to help.

If you can't find what you're looking for, we're here to help. Get in touch any time.

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