![Apple iPhone 15 Pro](http://wmstatic.global.ssl.fastly.net/ml/7290923-f-447566e7-b0d2-4989-aca2-c388b03173ff.png?width=150&height=320)
Apple iPhone 15 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/7290923-f-22e74535-90f5-475a-b0c1-eee379f0c2c7.png?width=214&height=462)
Press Mobile Service.
![](http://wmstatic.global.ssl.fastly.net/ml/7290923-f-a3437edd-2eb6-4286-ad17-e86968626574.png?width=214&height=462)
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/7290923-f-1162e57d-f23c-4967-bd85-98f3a3a08c99.png?width=214&height=462)
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/7290923-f-1162e57d-f23c-4967-bd85-98f3a3a08c99.png?width=214&height=462)