Apple iPhone 15 Pro Max

iOS 18

iOS 18 iOS 17

I can't use Wi-Fi calling on my Apple iPhone 15 Pro Max iOS 18

Cause 2 of 4: Your phone's software hasn't been updated to the latest version

If you can't use Wi-Fi calling, you may need to update the phone software to the latest version.

Step 1 of 3

Update phone software

Press Settings.

Step 2 of 3

Update phone software

Press General.

Step 3 of 3

Update phone software

Press Software Update. If a new software version is available, it's displayed. Follow the instructions on the screen to update the phone software.

Press Settings.

Press General.

Press Software Update. If a new software version is available, it's displayed. Follow the instructions on the screen to update the phone software.