Nokia Software Updater

Note:
What are the benefits of updating my Nokia device firmware?

The benefits of updating the Nokia device firmware include getting new features, applications, and performance improvements to your device.
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What exactly am I updating?

You are downloading a PC application that helps you update your Nokia mobile device's operating software (also known as device firmware).

Nokia device firmware is the software that is embedded in the memory of your device, and includes applications such as the calendar and phonebook. This is similar to the operating system software on your PC. The update consists of new features, applications, and performance improvements to the software.

User data such as contacts, photos, messages, and add-on applications such as Java games or Symbian applications are not part of the device firmware.

In some Nokia device models, user data – such as contacts and pictures – will be deleted during the software update. It is therefore strongly recommended that you make a back-up of your data before updating your Nokia device firmware to prevent these files being lost.

When you perform the update, and your Nokia device requires a data backup, the Nokia Software Updater will instruct you when to perform a back-up of your data.

Note: Nokia device firmware cannot be downgraded. Once you have upgraded your device, you will not be able to restore to the earlier version.

For more info check here :
http://europe.nokia.com/A4577229