The links in the forum offer various update info on older phones.
Read a few and you should be able to do the update on your phone.
This is a link to one
http://www.blackberryforums.com/gene...ilanguage.html
This one includes a link to ATT downloads for most versions of the Blackberry.
Also you should download "desktop manager" from Blackberry.com. It is a free application that will allow you to manage your phone for contacts and updates.
Link for desktop manager
BlackBerry Desktop Software - BlackBerry OS Software - EN - United States