Turning data roaming on my mobile phone on or off
If you want to avoid using data when you're abroad, you need to turn off data roaming on your mobile phone. Once done, you can only make voice calls, send SMS and use applications that don't require an internet connection.
1. Find "Cellular"
2. Turn data roaming on or off
Tap the indicator next to "Data Roaming" to turn the function on or off.
3. Return to the home screen
Tap the Home key to return to the home screen.