1 Find "Mobile & SIM"
Slide your finger downwards starting from the top of the screen.
Press All settings.
Press Network & wireless.
Press Mobile & SIM.
2 Turn data roaming on or off
Press the drop down list below "Data roaming options".
Press roam to turn on roaming.
Press don't roam to turn off roaming.
3 Return to the home screen
Press the Home key to return to the home screen.