Samsung Galaxy S9
Android 8.0
Select help topic
1. Find "Wi-Fi"
Slide your finger downwards starting from the top of the screen.
![](http://cdn.sp-selfservice.com/ml/7090822-f-d0e3b1c0-01b8-444a-ace7-f98aae9b8879.png?width=212&height=434)
Press the settings icon.
![](http://cdn.sp-selfservice.com/ml/7090822-f-5d67e67e-47c8-486d-8b87-2ec7d16b7324.png?width=212&height=434)
Press Connections.
![](http://cdn.sp-selfservice.com/ml/7090822-f-bd3b6dfe-e94b-4e86-a80b-0577bcc3f10e.png?width=212&height=434)
Press Wi-Fi.
![](http://cdn.sp-selfservice.com/ml/7090822-f-353ec5ab-fdb2-435b-8f6d-2c8a6d670b78.png?width=212&height=434)
2. Turn on Wi-Fi
Press the indicator to turn on the function.
![](http://cdn.sp-selfservice.com/ml/7090822-f-c87b6995-113e-45bf-8652-de12ad2cd2a3.png?width=212&height=434)
3. Turn automatic use of mobile data on or off
Press the menu icon.
![](http://cdn.sp-selfservice.com/ml/7090822-f-0cb6decf-5e17-4515-8a24-90daacd9fa0b.png?width=212&height=434)
Press Advanced.
![](http://cdn.sp-selfservice.com/ml/7090822-f-c4c260a9-39b5-41e1-8384-3a3fc1f100ce.png?width=212&height=434)
Press the indicator next to "Switch to mobile data" to turn the function on or off.
![](http://cdn.sp-selfservice.com/ml/7090822-f-eba27a23-b391-40c1-aab7-c5936c42c07a.png?width=212&height=434)
4. Return to the home screen
Press the Home key to return to the home screen.
![](http://cdn.sp-selfservice.com/ml/7090822-f-eba27a23-b391-40c1-aab7-c5936c42c07a.png?width=212&height=434)