This article explains how to make your iPhone or Android's camera flash when there is a notification, such as an alarm or a call. We also provide a list of third-party apps that perform the same function.
How to Make Your iPhone Flash When You Get a Text or Call
Setting up an iPhone notification light is easy. The option is in the Settings app. Here’s what you need to do:
Tap Settings > Accessibility.
In older iOS versions, you have to tap General before you can find the Accessibility settings.