How can I backup my contacts and get them back? My question might sound stupid, but I want to backup my contacts, so even when I lost the phone or deleted the contacts, or factory reset the phone, I can still have the contacts. I never backup contacts before, so pls offer a detailed guide, thanks.
Use google contacts sync. to backup online, so your contacts will be safe there.

Read more at
https://www.google.com/sync/index.html