Nokia 6120 classic User Manual page 114

If your device has OMA DRM protected content, to back up both the activation keys
and the content, use the backup feature of Nokia PC Suite. Other transfer methods
may not transfer the activation keys which need to be restored with the content for
you to be able to continue the use of OMA DRM protected content after the device
memory is formatted. You may also need to restore the activation keys in case the
files on your device get corrupted.
Some activation keys may be connected to a specific SIM card, and the protected
content can be accessed only if the SIM card is inserted in the device.
Select Menu > Settings > Data mgr. > Actv. keys to view the digital rights
activation keys saved in your phone.
To view valid keys ( ) that are connected to one or more media files,
select Valid keys. Group keys, which contain several keys, are indicated
with . To view the keys contained in the group key, select the group key.
To view invalid keys ( ) with which the time period for using the file is
exceeded, select Invalid keys. To buy more usage time or extend the usage period
for a media file, select an invalid key and Options > Get new key. It may not
be possible to update activation keys if web service message reception is
disabled. See "Service message settings," p. 55.
To view activation keys that are not in use, select Not in use. Unused activation
keys have no media files connected to them.
To view detailed information such as the validity status and the ability to send
the file, scroll to an activation key, and select it.
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