Keeping your handset firmware (the software embedded in hardware) up-to-date is an important thing to do. Why? Because software is constantly being updated with enhancements and/or bug fixes. If you have one of the more recent S60 Nokia handsets, go checkout the Nokia UK phone software update page. There are two methods to update your phone's firmware: over-the-air, and PC/cable. Over-the-air support is not there for all phones, and more phones will be added to the update list later in the year. For PC/cable installation, after selecting your model, a Windows-only executable file (NokiaSoftwareUpdaterSetup.exe) is downloaded to your PC. Follow the instructions. You should check for updates often, perhaps every three months (Nokia recommends every month). 

I updated the firmware for my (new unlocked) 6680. The process was painless and took like 10-15 minutes. I have noticed though that the handset behaves slower after the update, something that I'm trying to figure out why…

ceo