My Blackberry 8100 is a little unintuitive in the call forwarding menu.

I have two options

Forward all calls

Forward Unanswered calls

and a radio button that toggles either one on.

If I go into this screen and select Forward all calls > Do not Forward, and then click save it does not save this setting. When I next go into the screen the Forward Unanswered calls radio button is selected.

Am I missing something or being thick?

I just don't ever ever ever want the thing to go to voicemail.