The Contacts app gives you quick access to everyone you want to reach. To open it, touch the Contacts icon on a Home or All Apps screen.
When you first turn on your device and sign into a Google Account, existing contacts from that account are synced with your Contacts app. After that, your contacts stay in sync automatically on your different devices or a Web browser.
If you use Exchange, you can also sync that contact information with Contacts.
All your Contacts information is available from Gmail, Hangouts, and other apps. As you add contacts from different sources, they’re synced automatically across all the places you need them.
When you open the Contacts app, you can:
View all contacts or favourites
Choose from the top of the screen
Add a contact
Touch Add Contact
Touch a name to see details for a contact or group
Share the contact
Share a contact or place a frequently used contact on the Home Screen. Touch Menu
While viewing a contact, touch Edit at the top of the screen to edit the contact’s information
Change your settings
While viewing the main list screen, touch Menu to import or export contacts, choose display options and add or edit accounts