Xiaomi Redmi Note 9
Android 10.0
Select help topic
1 Find "Data roaming"
Press Settings.
Press SIM cards & mobile networks.
Press Advanced settings.
Press Data roaming.
2 Turn data roaming on or off
Press the indicator next to "Data roaming" to turn the function on or off.
3 Return to the home screen
Press the Home key to return to the home screen.