After an accident, a sudden illness or in a dangerous situation there is often no time or chance to unlock your phone and dial a number. The emergency features on iPhone and Android phones let you call emergency services with a few button presses, send your location to your loved ones after the call, and let people on the scene see your details from the lock screen.
You only need to set these up once, at a calm moment. Below we first set up Medical ID and Emergency SOS on iPhone, then emergency information and Emergency SOS on Android, and finally check that your details appear on the lock screen. You decide which health details to enter; this guide only shows where the settings are.