How can I view the call duration after a call or during a call on my Nokia device?

To view the call duration for the last call, or total duration of received calls, dialled calls and all calls, select MenuLog > Call duration.

To view the call duration during the call, select Menu > Tools (or Settings or Ctrl. panel) > Settings > Phone > Call > Show call duration > Yes before the call. When there is an active call, you can see the call duration in idle mode.