I want the changes I make to a contact in one folder to automatically update
to all other Contacts folders in which that same contact name appears.

Here's a hypothetical example. I have 4 Contacts folders: the main Contacts
folder and 3 others which we'll call ABC Company, Potential Vendors, and L.A.
Division. (I use the main Contacts folder to include all my contacts.) John
Doe happens to be listed as a contact in all 4 of these Contacts folders. I
change John's phone number in the Potential Vendors folder.

Now how can I make this change update to all of the other 3 folders to show
John Doe's corrected phone number?

Note: I do not want to just categorize these contacts within the one main
Contacts folder.

I have been needing to do this at work and at home so that using multiple
contacts folders is more efficient. Your suggestions are appreciated!