Merge contacts automatically using Custom Merge Rules
You can merge contacts automatically using Custom Merge Rules
Steps
Go to the Contacts app - Access the Contacts App (Manage Contacts page)
Press the More Options button
Select Merge Contacts
You arrive on the Merge Contacts page
Press the Merge Contacts button
Select Merge contacts automatically
You arrive on the Custom Merge Rules page
Press Create a Merge Rule
Give this Custom Merge Rule a name
Decide how you want your Custom Merge Rule to work by choosing the field(s) that need to be identical in order for eligible contacts to be merged
Press save
You arrive back on the Custom Merge Rules page. From here you can
Edit a Custom Merge Rule
Deactivate or Reactivate a Custom Merge Rule