difference between screensavers and wallpaper

Another basic newbie question, I'm afraid.

What's the difference between wall papers and screensavers? A little
animated sequence would be nice so would that have to be a screensaver and
if so, how can you force the phone to dispaly the screensaver?

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"John Constable" <[email protected]> wrote in message
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| if so, how can you force the phone to dispaly the screensaver?
|

Hold down the pound (#) key ... only displays for a few seconds though and
goes back to standby screen.