Nokia 6681 User Manual page 25

To filter the log, select Options > Filter and a filter.
To erase the contents of the log, recent calls register, and
messaging delivery reports permanently, select Options >
Clear log. Select Yes to confirm.
To set the Log duration, select Options > Settings > Log
duration. The log events remain in the phone memory for
a set number of days after which they are automatically
erased to free memory. If you select No log, all the log
contents, recent calls register, and messaging delivery
reports are permanently deleted.
Packet data counter and connection timer: To view how
much data, measured in kilobytes, has been transferred
and how long a certain packet data connection has lasted,
scroll to an incoming or outgoing event indicated by Pack.,
and select Options > View details.
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