Phone hacking how to change your voicemail password

The News of the World phone hacking operation was made easier to achieve by
the widespread use of default or easy-to-guess passcodes.

It's simple to
change yours to something more secure.

Source:
http://www.telegraph.co.uk/news/uknews/phone-hacking/8622582/Phone-hacking-how-to-change-your-voicemail-password.html