It's important that the date and time are correctly set as some phone functions may not work. In most cases date and time are automatically set, but you can also set them manually.
Find "Date & Time"
Press Date & Time.
Activate automatic time zone, date and time update
Press the indicator next to "Set Automatically" until the function is activated.
To manually set the time zone, date and time, you need to deactivate automatic time zone, date and time update and press Time Zone and the date. Follow the instructions on the display to set the time zone, date and time manually.
Return to the Home screen
Press the Home key to end the session and return to the Home screen.