iOS 5 tip: How to enable LED flash alerts
iOS 5 introduced a number of new and varied notifications, from the Notification Center and different alert tones for different apps to custom vibration patterns and a new visual alert.
Buried in the accessibility settings is a new feature that uses the LED flash next to the rear-facing camera on the iPhone 4 and iPhone 4S to notify you to incoming calls and alerts. It's a great feature for the hearing impaired and anyone who would rather receive visual rather than audio alerts.
To set it up, to to Settings > General > Accessibility and then scroll down until … Read more