Set date and time
It's important that the date and time are correct as some phone functions won't work.
Find "Date & time"
Slide two fingers downwards starting from the top the screen.
Tap the settings icon.
Tap Date & time.
Turn on automatic date and time update
Tap the indicator next to "Use network-provided time" to turn on the function.
Turn on automatic time zone update
Tap the indicator next to "Use network-provided time zone" to turn on the function.
Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.