If you want to view the current software version on Nokia N97 mini mobile phone, then you can use the Device Update option available under the settings menu.
Click on the menu button to access the Settings menu
Select settings menu
Select Phone from the menu list
Select Phone mgmt.
Select Device updates. This would display the currently installed software version and Software version date etc.
If you want to check whether any latest updates available, then you can select options and select Check for updates.