PopSci – “While we hope you all live long and healthy lives without experiencing a  medical emergency, they do happen—and if one happens to you or someone close to you, then you want to be as prepared as possible. The iPhone has a few features that can help. You can log key health details on the handset, which will then be available to emergency responders, if required. There are also a couple of tricks worth knowing for making emergency calls.  This prep doesn’t take long, and should something serious happen to you, you’ll then stand the best chance of getting the help you need. Here’s how to get everything set up so your iPhone is ready for an emergency.