Get your iPhone's flash to blink when you get a message
If you find that the vibration or sound that your phone makes when you get a message is not always enough to attract your attention, there's another element that you can add to the alert: light. By going to Settings > General > Accessibility and scrolling down to the 'Hearing' section (this feature is designed for people with hearing impairments), you can turn on 'LED Flash for Alerts'.
Now every time you get a notification, the flash next to your iPhone's rear-facing camera will blink.
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