Nokia N93 - Manual (Page 112)

Tools
111
Valid keys —View keys that are connected to one or more
media files and keys whose validity period has not started yet.
Invalid keys —View keys that are not valid; the time period
for using the media file is exceeded or there is a protected
media file in the device but no connected activation key.
Not in use —View keys that have no media files connected
to them in the device.
To buy more usage time or extend the usage period for a
media file, select an invalid activation key and
Options >
Get activation key . Activation keys cannot be updated if
web service message reception is disabled. See "Web
service messages", p. 47.
To view detailed information, such as the validity status
and ability to send the file, scroll to an activation key, and
press .