Just copied this from another forum, i have just unsubscribed
Maybe you have heard that early next week all UK mobiles will be on a directory from which anyone will be able to access the numbers.
It is easy to unsubscribe but it must be done before the beginning of next week (Sunday 11 July 2009) to make sure that you are ex directory. I have unsubscribed and you may want to suggest it to all your friends and family who have UK mobiles or they and/or their children could be swamped by unsolicited messages and calls. I believe that my mobile number is private and I should be able to choose to whom I give it. I did not agree to it being made public when I signed my mobile 'phone contract. Removal is recommended by the BBC - log onto the website below for more information.
To remove your number log onto the website below. Click on 'Home' and then 'Ex-directory', top right (you need your mobile phone with you and you will be sent a text with a code number).