For iPhone 8 and later: Press and hold the side button and either volume button until an "SOS Emergency Call" slider appears on the screen. Slide your finger on it to call local emergency services.

Here's where you add medical information and emergency contacts. What's on this screen can be seen by anyone with access to your iPhone. To change that you can turn off "Show when locked" or ...

YOUR iPhone has a special option for "quietly calling" emergency services – and it's important to know how it works. You'll need to activate a setting before you can do it, so familiarise ...