How can I back up my contacts in to iCloud

If you have trouble setting up iCloud Contacts

• Update your iPhone, iPad, or iPod touch to the latest version of iOS and iPadOS, and your Mac to the latest version of macOS.
• Make sure that you’re signed in to iCloud with the same Apple ID on all of your devices.
• Set up iCloud on all of your devices. If you have a PC, download iCloud for Windows.
• Make sure that you're connected to Wi-Fi or have an active Internet or cellular connection.
• Learn what to do if you see duplicate contacts after setting up iCloud Contacts.
• Get help if your iCloud Contacts won't sync. 

When you turn on iCloud Contacts, all of the information* stored on separate devices uploads to iCloud. If you turn off iCloud Contacts, your information won't automatically move from iCloud back to your device.

On your iPhone, iPad, or iPod touch

1. Go to Settings > [your name] > iCloud. 
2. Turn on Contacts.
3. When you're asked if you want to Merge or Cancel, tap Merge.

All of the information stored in Contacts uploads to iCloud.