Use Your iPhone's LED Flash as a Notification Alert1
The iPhone has never had an LED notification light like some Android handsets have, but you can use the flash around the back of the phone instead to alert you to new messages and updates.
If your iPhone is in quiet mode or sat on its back it gives you a subtle visual cue that something’s happening—here’s how to set it up.
This is by no means a new feature in iOS—it’s been doing the rounds for years now—but if you’ve recently made the switch to the iPhone or you’ve never taken much time to explore its features, then you might not be aware of it. It’s one of those hidden settings that’s easy to miss if you’re not specifically looking for it.