It's also a great idea to complete your Emergency Contact information using the "Medical ID feature" on your cell phone so it is available to emergency personnel on your lock screen without needing to unlock your phone.
To access medical emergency information on an Android or iPhone lock screen, use the "Medical ID" feature which allows you to display vital details like allergies, blood type, medications, and emergency contact information directly on the lock screen without needing to unlock the phone; on an iPhone, access this through the Health app, and on Android, navigate to "Safety and emergency" settings to find the medical information option. (Enable the "Show When Locked" option.)