I think losing your phone might count as an emergency in some circumstances… So lets set that shiz up:
Apple Guide to Setting Up an Emergency Contact & Medical ID
Locate and open the Health App
Select the Medical ID tab in the bottom right
Tap “Create Medical ID” or Edit in the top right
Complete the information for an emergency contact and your medical ID information
Toggle “Show When Locked” as on and hit done
You’re done!
Click to zoom in
Android Guide to Setting Up an Emergency Contact & Medical ID
Android doesn’t really have a standard practice for this but… you can get a free emergency contact app from the Google Play Store that serves the same purpose.