Get LED flash alerts on your iPhone or iPad
The LED flash next to the camera lens on the back of your iPhone or iPad can blink when your device is locked and you receive a notification. This can be useful for anyone who might miss audible alerts.
How to turn on LED Flash for Alerts
Open the Settings app, tap Accessibility, then tap Audio/Visual.
Turn on LED Flash for Alerts.
To prevent LED flashes when your iPhone or iPad* is in silent mode, turn off Flash on Silent.
LED Flash for Alerts works only when your device is locked.
* LED Flash for Alerts is available for iPad Pro (9.7-inch), iPad Pro (10.5-inch), iPad Pro 12.9-inch (2nd generation) and later, iPad Pro 11-inch (all models), and iPad mini (6th generation).