You can update your Nokia C6 firmware over OTA (Over-The-Air) or via Nokia’s Software Updater application, Ovi Suite on Windows PC . The Nokia C6 does have UDP (User Data Preservation), but its always a good idea to backup all your personal data before updating the firmware.
Note: It may take some time before the new firmware is available for your region.
Changelog for Nokia C6:00.
CHANGES AND IMPROVEMENTS
Fix implemented to keyboard freeze problem
Performance enhancements done
Email application stability has been improved
Memory related issues have been improved
Changes to memory card/mass memory content
Memory card – Maps data version 24
Here and now application
Changes to vanilla SW UDA content
NEW FEATURES AND APPLICATIONS / UPDATES TO EXISTING APPLICATIONS / NEW FEATURES