iPhone feature that can turn your phone into an emergency beacon if you are in danger is being highlighted online.The Sarah Everard case has prompted social media users to share the little-known feature that can alert the emergency services alongside your own contacts.The feature allows you to call for help - alerting a friend and police and even sounding an alarm - without fumbling to unlock your device.It comes as women have rushed to highlight safety tips following the disappearance of 33-year-old Sarah, who was last seen walking home in Clapham, London, on March 3 after leaving a friend’s house.On Twitter, one woman posted: "Chatting with girlfriends about being afraid to walk home at night in London after the disappearance of Sarah.
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