Apple iPhone 12

iOS 17

iOS 18 iOS 17

My Apple iPhone 12 iOS 17 uses a large amount of mobile data

Cause 1 of 7: Wi-Fi Assist is turned on

If Wi-Fi Assist is turned on, your phone will use mobile data when the connection to the Wi-Fi network is poor.

Step 1 of 4

Find "Mobile Service"

Press Settings.

Step 2 of 4

Find "Mobile Service"

Press Mobile Service.

Step 3 of 4

Turn Wi-Fi Assist on or off

Press the indicator next to "Wi-Fi Assist" to turn the function on or off.

Step 4 of 4

Return to the home screen

Slide your finger upwards starting from the bottom of the screen to return to the home screen.

Press Settings.

Press Mobile Service.

Press the indicator next to "Wi-Fi Assist" to turn the function on or off.

Slide your finger upwards starting from the bottom of the screen to return to the home screen.