Do you want your iPhone flash randomly
when there is an incoming calls or messages? Well there is a way to enable flash light notification on every incoming text messages, calls and apps notification on your iPhone, iPad and iPod touch.
Well there is a way to enable flash light notification on every incoming text messages, calls and apps notification on your iPhone
Your iPhone has a hidden feature that
allows your phones flash to blink whenever there is an incoming calls or
messages. Let’s say you accidentally turned off the Ring and Vibration of the
phone but if you have turned on the LED flash alert than you will be able to
know whenever there is an incoming alert. This is an accessibility features for
the people who cannot hear. Enabling flash light will blink flash light which helps you know the
incoming alert in every notification on your iPhone.
Follow these simple steps to Enable LED
Flash for Alerts on iPhone

Go to Settings à General à
Accessibility à Turn on the LED Flash for Alerts

That is all you need to do. There will
be a random flash light blinking if you get any incoming calls or messages and on the apps notification.