I wonder if you help me with this. I have a Curve 8310 that I have had a few issues with. I need to find out what the date the OS was upgraded on the phone and also the date several of the applications where loaded onto it.
I don't think you can see on the phone itself, but if you let the upgrade do a backup, the backup is dated. You should have a file named LoaderBackup-(DATE).ipd in your My Documents folder. That's for the OS.
As far as apps go, I don't know of any way to see when something was installed.