Popsugar Culture Tech Tips How to Set Up Emergency SOS in iOS 11 This 1 Feature on iOS 11 Could Save Your Life June 6, 2018 by Ann-Marie Alcántara First Published: September 25, 2017 View On One Page Photo 6 of 6 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 6 If you go back to "Emergency SOS," you can also turn on "Countdown Sound." If you turn this on, you'll hear a loud sound for three seconds before your iPhone calls emergency services. Previous Next Start Slideshow Tech TipsDigital LifeAppleTechnologyIOS 11