![Apple iPhone 12 Pro](http://wmstatic.global.ssl.fastly.net/ml/7111023-f-ac1af023-1e73-437d-bbe6-2222bebcd46a.png?width=150&height=320)
Apple iPhone 12 Pro
iOS 17
Turn Wi-Fi Assist on or off
You can set your phone to use mobile data automatically when the connection to the Wi-Fi network is weak. To turn Wi-Fi Assist on or off, you need to turn on mobile data.
1. 1. Find "Mobile Service"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7111023-f-5c4a42b6-50a6-488b-a367-d138066b9bbd.png?width=210&height=458)
Press Mobile Service.
![](http://wmstatic.global.ssl.fastly.net/ml/7111023-f-66b50edf-392c-48c6-8469-400173cb7d6d.png?width=210&height=458)
2. 2. Turn Wi-Fi Assist 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/7111023-f-44a9d880-372d-4a78-8b7f-0a4ca962ed5a.png?width=210&height=458)
3. 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/7111023-f-44a9d880-372d-4a78-8b7f-0a4ca962ed5a.png?width=210&height=458)