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:
Indicators
...
Database
The digitized map database reflects
conditions as they existed at various points
in time before production. Accordingly,
your database may contain inaccurate or
incomplete data or information due ...
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 ...