Help with your account

Security and passwords

Security is important to us – that’s why we protect your data with some of the most sophisticated online security and encryption systems available.

What happens if I forget my password or username?

Your username is always your email address.
If you have access to My O2 Business there are two ways you can change your password:

  • On the My O2 Business sign-in page, click Forgotten password? and follow the instructions
  • If you’ve already signed in to My O2 Business, click your name in the Edit my details section on the right-hand side of the page, scroll down and click Change my password
How long is a password valid for?

We'll ask you to change your password every 90 days.

How secure is my data?

We use the highest level of encryption available on the internet – 128-bit – to make sure your data is as safe as it can be. Website addresses starting with 'https' show that you're using a SECURE connection – you’ll see this when you sign into your account.

I’m locked out of my phone – how can I unlock it?

If you’ve forgotten the security pin code for your device, you’ll need a PUK code to unlock it.

  • Sign in to My O2 Business and go to My Account
  • In Manage devices, select Unlock device
  • Choose the mobile number you want to unlock
  • Click Request a PUK code
  • Type your PUK code into your phone to unlock it
  • Still locked out? Get it touch with your usual O2 Business contact or call us on 0800 977 7337.

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