If you want to keep your existing phone number when you move to Three, first you'll need to insert your new Three SIM into your phone and turn it on. Then you'll need to let your old network provider* know you're leaving and ask them for your PAC (Port Authorisation Code).

Network contact details.  

Next you’ll need to fill in our online form to let us know your PAC.

So that we can get in touch if there are any difficulties, if you're on Pay As You Go you'll need to register your My3 account online first.

You'll also need:

• your existing mobile number and your new Three number
• your email address
• the name of your old network provider
• your PAC.

If you send your form in before 5pm from Monday to Friday (excluding bank holidays), your number should be moved during the next working day. If you send your form in outside of these times, we’ll process your request as soon as we can on the next working day, and let you know by text or email when your number will be moved.

To transfer your number, you’ll need to keep your account active with your old provider and you’ll lose any credit on your old account.

If you need to cancel your moving date, just let us know by 5pm on the working day before we’re due to move your number.

*Unfortunately we can't transfer any numbers from Lycamobile. So if you're moving from Lycamobile to Three, or have a number which started with Lycamobile, you'll need to carry on using your new Three number.

Free Pay As You Go credit for transferring your number.

If you're on Pay As You Go, once you've transferred your number you'll get £10 extra credit from us when you top-up for the first time as a thank you for moving your number. You'll get this free credit after 31 days, as long as you top-up by at least £10 within 30 days of transferring your number.