Update availability may vary depending on your phone model, region, and network service provider or carrier. You can check your current phone software version by dialing *#0000#.
To check for new updates go to Menu > Settings > Phone > Device updates on your phone and select downl. phone sw option. You can also set the phone to check for new updates automatically from Settings > Phone > Device updates > auto SW update
If your phone is supported by Nokia Suite and you have it installed on your computer, it will automatically notify you of new software updates when you connect your phone to your computer.