How to add an emergency contact on your iPhone, and what they're used for

Your emergency contacts appear on your iPhone's Medical ID, and receive a text if you use the Emergency SOS feature.

How to sync your contacts to iCloud and access all of your contacts from any device

You can sync contacts to iCloud from any Apple device to access each contact anywhere you can sign in to your iCloud account.
TechRepublic

How to add photos to your iPhone contacts

Learn more about how you can spruce up the contacts on your iPhone by associating a photo or image with each one. You maintain a list of contacts on your iPhone, and you’d like to see a photo of each ...
SlashGear

How To Change Your Contact Photos On iPhone

Over the years, most of us have accumulated a lot of iPhone contacts. When you meet someone new, in addition to socials, you often exchange phone numbers. Whether you own an iPhone 15 Pro Max or a ...