1. Find "Mobile Data"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-72cd2bd1-dcd8-4313-be9f-fea2d1d716ef.png?width=208&height=454)
Press Mobile Data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0953291a-a81c-42b3-9cbe-c072cdab5dc7.png?width=208&height=454)
2. Turn automatic use of mobile data on or off
Press the indicator next to "Wi-Fi Assist" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-5f6ec91f-5ad3-40e6-bf70-221c18e3e54e.png?width=208&height=454)
3. Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-5f6ec91f-5ad3-40e6-bf70-221c18e3e54e.png?width=208&height=454)