Set date and time
It's important that the date and time are correct as some phone functions won't work.
Find "Date and time"
Slide two fingers downwards starting from the top the screen.
Tap the settings icon.
Tap General management.
Tap Date and time.
Turn on automatic date, time and time zone update
Tap the indicator next to "Automatic date and time" to turn on the function.
Return to the home screen
Tap the Home key to return to the home screen.