Nokia 5800 Firmware Upgrade

Yes, there is a new firmware upgrade V.11.0.009 just a few weeks
ago but its nothing major. But on the Internet lately, the latest is
V20.0.0.0.12. Unfortunately, silly old me do not know how to go
about it. Even my Nokia Software upload says there is no update.
Oh well, maybe it will be official in a few week's time.