Depending on the length of time the power was interrupted, your system may require GPS initialization.

If initialization is not necessary, the system proceeds directly to the Startup Confirmation screen.
If the system fails to locate a sufficient number of satellites to locate your position within 10 minutes, the following screen is displayed.

If you are experiencing GPS reception problems:
Adjusting the Steering Wheel
The steering wheel height and distance from your body can be adjusted so that
you
can comfortably grip the steering wheel in an appropriate driving posture.
1. Pull the steering wheel adjustment ...
Using Call History
PHONE button
► Call History
1. Select a call.
Select All, Dialed, Received,
Missed to view the call history
by category.
2. Select Call to begin dialing.
The call history show ...