Published by Steve Litchfield at 10:52 UTC, August 11th 2007
A. Run, don't walk, to Nokia's web site (e.g. here's the link for the E90 support page - http://europe.nokia.com/A4397256), where there are lots of extra 'user guides', with titles like 'Nokia E90 Communicator E-mail Support Guide', 'Nokia E90 Communicator Printing Guide', 'Nokia E90 Communicator Transferring Data Guide', and so on.
All in many different languages too! Each is in PDF format, for viewing on the device itself or on your desktop.