Nokia N8-00 - Manual (Page 100)

It is recommended that you back up your personal data before updating your phone
software.
Warning:
If you install a software update, you cannot use the device, even to make emergency
calls, until the installation is completed and the device is restarted.
Using services or downloading content may cause transfer of large amounts of data,
which may result in data traffic costs.
Make sure that the device battery has enough power, or connect the charger before
starting the update.
After the update, the instructions in the user guide may no longer be up to date. You
may find the updated user guide at www.nokia.com/support.
Update phone software and apps using your phone
You can check for updates for your phone software or apps, and download and
install them to your phone wirelessly (network service). You can also set your phone
to automatically check for updates and notify you when important or recommended
updates are available.
Select > SW update .
You may need to restart your phone to finish the update.
View update details
Select and hold an update.
100 Phone management