Light up when receive incoming phone call Air pad at 4 corners, providing 360 degree protection; 0.88mm crown protect the camera lens; Before use this phone case, please make setting of your iPhone as below: (1) Adjust the plate to the LED Blink ON, and then, setting your phone, then have incoming call blink flash function. (2) How to set the incoming call flash on your phone? "Settings" => "general" => "Accessibility" => "LED flash For Alerts"