How to backup your Android phone's contacts to Google, and restore them from a backup

With an Android phone, you can backup your contacts to Google in a few quick steps. Here's how to backup contacts to Google ...
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 ...

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.
Forbes

What Are iPhone Widgets? Here’s How To Add Them To Your Phone.

iPhone widgets are used to quickly glance at information from frequently-used apps—here’s how to add them to both a lock screen and home screen, stack them and troubleshoot them. iPhone widgets ...