Your iPhone usually lets you know when a notification comes in with sound, vibration or both. But in certain situations, audible alerts and vibration won't be enough to attract your attention, like when in a loud environment such as a night club. Or perhaps you simply don't want to be disturbed with sound or vibration at all.
With iOS 5 and later, iPhones from the iPhone 4 onward can use the LED flash next to the rear camera to alert you of incoming calls, messages and other notifications. In this post, we'll show you how to enable LED flash for notifications.
