1 Find "Data services while roaming"
Slide your finger downwards starting from the top of the screen.
Press the settings icon.
Press Network & Internet.
Press Mobile networks.
Press Data services while roaming.
2 Turn data roaming on or off
If you want to turn on data roaming, press On.
If you want to turn off data roaming, press Off.
3 Return to the home screen
Press the Home key to return to the home screen.