Every 30 days you can change your numbers, adding any new friends and maybe get rid of a few old ones.
But before you do, we need to send you a code to make sure only you can set up and edit Your O2 Numbers. Simply enter your O2 Pay & Go number below and we'll send you the code instantly by text message. Remember to have your mobile with you and switched on. You'll need a new code each time you visit the site.
* Boxes you need to complete