BlackBerry Curve 8310
Official AT&T update to v4.5
https://www.blackberry.com/Downloads/browseSoftware.do » Â»
as it is the same page. Make sure you have the Desktop manager installed, but not running, and the phone has to have wireless disabled and not be connected to the computer when you install the update. Backup, then install the software thru the desktop manager. *there have been some issues with the automatic backup and the automatic update, do these manually from the desktop manager and you should be good to go.