HTC 3125 / Smartflip / 8500 (Star Trek)

I've changed to a consolidated Bellsouth/Cingular voice mailbox which has a different access number than the one pre-programmed to speed dial key 1. The speed dial tool won't allow the editing of key 1.

Does anyone know where the pre-programmed voicemail number is stored and how to change it?

Thanks...........