Does the subject want to ask, "What if the face-lifting function of a smooth-faced camera can't be opened?" Check for updates and restart the phone.

1. Check for updates: Make sure that the light camera application is the latest version, because the developer has fixed the problems in the old version. You can go to the app store and search for a light camera to make sure the app is the latest version.

2. Restart the phone: Sometimes simply restarting the phone can solve the application problem, restart the phone and open the light camera application again.