Apple iPhone 15 Pro Max

iOS 18

iOS 18 iOS 17

I can't use one of my apps on my Apple iPhone 15 Pro Max iOS 18

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

If you can't use one of your apps, the app may require you to update your phone 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.