How to Find and Merge Duplicate Contacts on iPhone?

First, make sure your mac and iCloud are syncing to do the task. If they are not synced, click on Apple logo in top-left corner of the screen, click System Preferences, and making sure that Contacts is checked under Apps on this Mac using iCloud.

Go to the contacts app on the mac > click “Card” > select “Look for duplicates”.

Now you have to wait for a moment, then the system will tell you how many duplicates you have in your iPhone.

You will see a pop up and asking to merge duplicate contacts.

Another Way to Locate Duplicates

Scroll to the bottom of your contact list, you will see the total number of contacts with duplicate contacts found.