How to delete duplicate contacts in mobile phone address book

If you use a vivo phone, you can check the following methods:

Methods of deleting duplicate contacts in 1, OriginOS/Funtouch OS 3.0 and above systems

Enter Settings-(Application and Permission)-(System Application Settings)-Contacts-Merge Duplicate Contacts/Delete Duplicate Contacts/Duplicate Contacts-Select Contacts-Merge To completely overlap the data of several identical contacts is equivalent to deleting duplicate contacts ~

Note: The same contacts stored in SIM card and mobile phone respectively are not regarded as duplicate contacts.

2. Method of deleting duplicate contacts in systems below 2.Funtouch OS 3.0

You can completely overlap the data of several identical contacts by entering the mobile phone contact-menu button on the left-duplicate contact-select contact, which is equivalent to deleting duplicate contacts.

Note: The same contacts stored in SIM card and mobile phone respectively are not regarded as duplicate contacts.