It’s free to upgrade from Ovi Maps 3.0: just download Ovi Maps 3.03/3.04 to your phone
Check your phone is compatible with Ovi Maps 3.03/3.04
For some phones, including the Nokia N97,you’ll be offered the Ovi Maps update through your phone’s Nokia Software Updater Application.
We recommend you update your phone’s software before you install Ovi Maps 3.03/3.04. If you have Nokia 5800 XpressMusic or Nokia N97 you will definitely need to do this first.
How to update your phone’s software:
Remember to back up your data before you update your phone’s software.