1. Find "SIM card & mobile data"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4d2fc1db-6e43-4e50-b03e-12f04abcc3a8.png?width=200&height=448)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f4b514bb-7e39-49ea-9aaa-67a2870ac9fd.png?width=200&height=448)
Press SIM card & mobile data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-c799b169-8d81-4a49-beef-b4035565f74f.png?width=200&height=448)
2. Turn data roaming on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-ea24450a-35b8-4fb8-a563-a97af0b38b68.png?width=200&height=448)
Press the indicator next to "Data roaming" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-ca4c2e54-ed47-4fca-9b80-9d51bbaca5b3.png?width=200&height=448)
If you turn on the function, press Turn On.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b0331ebd-410c-439b-9118-e0ffc24ceae6.png?width=200&height=448)
3. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-ca4c2e54-ed47-4fca-9b80-9d51bbaca5b3.png?width=200&height=448)