I recently transferred from an 02 contract to Vodafone PAYG. 02 issued me with a Nokia 8310 which i still use with Vodafone. It all works fine except speed dial number 1 appears to be unchangable on the phone and is set to 901 which is the 02 voicemail access number. How can I erase this so I can have speed dial number 1 as 121 for Vodafone voice mail.

Any ideas

Dave