Nokia N91

Page 5
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Important tips
5
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Delete Data
Sometimes a message “Delete Data” or similar text will 
appear, this is an indication that the Phone memory [C:] 
ROM may be full.
• To free up ROM space, delete some data from Phone 
memory [C:] (i.e. contacts or calendar items etc).
• However, if the “Delete Data” message persists (e.g. 
there could be some hidden temp files that are not 
accessible) then a Reset the Device settings back to 
factory default (memory/data) may be needed.
Hard drive unavailable (in use)
If this message appears it is recommended to:
• Ensure the battery cover is fully closed (see Getting 
Started Guide).
• If operating the device in Mass storage mode, discon-
nect the USB cable.
• Uninstall 3rd Party Applications.
• Format hard drive to remove data (i.e. content or 
applications) that may be causing the message to 
appear.
• Reset the device to factory settings (see ‘Reset factory 
settings back to default settings’).
• Update the software to the latest version available.
Performance
The following settings are recommended for optimal 
device performance:
Messaging Memory
 It is recommended to select only “Phone memory” in 
Messaging/Options/Settings/Other/Memory in use for 
messages (SMS, MMS).  
Profiles settings
The following Profile settings are recommended for opti-
mal device performance for the “in-use” profile:
• Select keypad tones OFF  
• Select Vibra OFF 
Pausing while playing a song
Sometimes a file may become corrupted (during encod-
ing, downloading). Some songs that play on the PC may 
pause on the device. In this event, it is recommended to 
encode and transfer the music file again (select a encod-
ing rate of 256kbps or lower).
Alarm tones
It is recommended to use the default tones provided on 
the device for alarm tones (clock, calendar etc). If a music 
file is to be used it is recommended that it be limited to 
MP3 format only.