![Apple iPhone 15 Plus](http://wmstatic.global.ssl.fastly.net/ml/7061023-f-6d0db060-957f-41ca-b7a0-70f768cfd4eb.png?width=150&height=320)
Apple iPhone 15 Plus
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/7061023-f-b7dd447f-926b-4252-aa91-157e0833cc72.png?width=212&height=458)
Press Mobile Service.
![](http://wmstatic.global.ssl.fastly.net/ml/7061023-f-887004f2-e129-440e-a621-d08a9e522ae1.png?width=212&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/7061023-f-92d53647-c138-4ed3-8ff6-08cf779cb4af.png?width=212&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/7061023-f-92d53647-c138-4ed3-8ff6-08cf779cb4af.png?width=212&height=458)