Nokia N81

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Applications
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already in your device. Revocation of such DRM software 
does not affect the use of content protected with other 
types of DRM or the use of non-DRM-protected content.
Digital rights management (DRM) protected content 
comes with an associated activation key that defines your 
rights to use the content.
If your device has OMA DRM protected content, to back up 
both the activation keys and the content, use the backup 
feature of Nokia Nseries 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.
If your device has WMDRM protected content, both the 
activation keys and the content will be lost if the device 
memory is formatted. You may also lose the activation keys 
and the content in case the files on your device get 
corrupted. Losing the activation keys or the content may 
limit your ability to use the same content on your device 
again. For more information, contact your service provider.
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.
To view the digital rights activation keys stored in your 
device, press 
, and select 
Applications
> 
Media
> 
Actv. keys
 and from the following:
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 
Options
> 
Get new key
.
To view detailed information, such as the validity status 
and ability to send the file, scroll to an activation key, and 
press .
Adobe Reader 
With Adobe Reader, you can read .pdf documents on the 
display of your device.
This application has been optimized for .pdf document 
content on handsets and other mobile devices, and 
provides only a limited set of features compared with PC 
versions.
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