Flash notifications use your iPhone's camera light to alert you instead of sound

Flash notifications are a built-in iPhone feature that makes your phone's camera flash blink when you get a call, text, or other alert. Instead of relying on sound or vibration, you see a visual signal — useful when your phone is across the room, in a noisy environment, or when you need silent alerts without drawing attention.

The feature is called LED Flash for Alerts in iPhone settings. It works on all recent iPhone models and turns on in about 30 seconds. Once enabled, your phone will flash whenever you receive notifications you've chosen to see — you control which apps trigger the flash, just as you control which apps make sound.

Key Takeaways

  • Flash notifications turn on in Settings > Accessibility > Audio/Visual, under the LED Flash for Alerts toggle.
  • Enabling the feature does not turn on flash for every notification — you still control which apps send alerts through your regular notification settings.
  • The camera flash will only blink when your phone is locked, so you won't see it while actively using your iPhone.
  • Flash notifications work alongside sound and vibration, not instead of them, unless you separately turn those off in each app's settings.

Where to find the LED Flash for Alerts setting

Open the Settings app on your home screen. Tap Accessibility, which is usually in the middle section of the Settings menu. Scroll down and tap Audio/Visual.

You will see a toggle labeled LED Flash for Alerts. Tap it once to turn it on. The toggle will turn green, and you're done — the feature is now active. Your camera light will flash the next time you receive a notification while your phone is locked.

How flash notifications work with your other alert settings

Turning on LED Flash for Alerts does not change how your notifications work. Your phone will still make sound and vibrate for alerts, exactly as it did before. The flash is an additional alert method, not a replacement.

If you want flash notifications without sound, you need to turn off sound separately for each app. Go to Settings > Notifications, tap the app name, and toggle off Sound. You can leave vibration on, turn it off, or keep both — the flash will still work regardless. This gives you precise control: some apps might flash and vibrate silently, while others flash and ring.

When the flash will and won't appear

The camera flash only blinks when your iPhone is locked. If you're actively using your phone, you won't see the flash — you'll see the notification on your screen instead. This prevents the flash from interrupting you while you're already looking at your phone.

The flash also won't appear if your phone is in a case that covers the camera light, or if the camera is already in use (for example, if you're on a FaceTime call). In those situations, you'll still get sound and vibration if you've enabled them.

Troubleshooting if the flash doesn't appear

If you've turned on LED Flash for Alerts but don't see the flash, check that the app sending the notification actually has alerts enabled. Go to Settings > Notifications, find the app, and make sure Allow Notifications is toggled on. If it's off, the app won't send any alert — no sound, vibration, or flash.

Also verify that your phone is actually locked when the notification arrives. The flash only works on the lock screen. If you're using your phone when the alert comes in, you'll see it on your screen instead. Try locking your phone and having someone text you to test whether the flash appears.

Why you might want flash notifications

Flash notifications are especially useful in situations where sound isn't practical or appropriate. If you work in a quiet office, attend meetings, or spend time in environments where ringing phones are disruptive, the flash lets you stay aware of incoming calls and messages without making noise.

They also help if you're in a loud environment — a busy restaurant, a concert, or a construction site — where you might not hear your phone ring. The visual alert is harder to miss than vibration alone, and it doesn't require you to check your phone constantly.

Frequently Asked Questions

Will the flash drain my battery faster?

No. The camera flash uses minimal power, and it only activates for a few blinks when an alert arrives. The battery impact is negligible compared to sound or vibration alerts.

Can I set the flash to work for only certain apps?

The LED Flash for Alerts setting applies to all apps that send notifications. You can't limit it to specific apps. However, you can turn off notifications entirely for apps you don't want to alert you, or turn off sound and vibration for apps where you only want the flash.

Does the flash work if my phone is in Do Not Disturb mode?

It depends on your Do Not Disturb settings. If you've set Do Not Disturb to allow calls or messages from specific contacts, the flash will still appear for those alerts. For notifications blocked by Do Not Disturb, the flash won't appear either.

What if my iPhone doesn't have this setting?

LED Flash for Alerts is available on iPhone 6s and newer. If you have an older model, this feature isn't available. Check your iPhone model in Settings > General > About if you're unsure which version you have.