Find "Mobile networks"
Slide two fingers down the display starting from the top edge of your phone.
Press the settings icon.
Press the settings icon.
Press More....
Press Mobile networks.
Turn mobile data on or off
Press Data connection.
To turn on mobile data:
Press the required data connection.
Press the required data connection.
To turn off mobile data:
Press Off.
Press Off.
Return to the home screen
Press the home icon to return to the home screen.