Tried the VZ Contact Backuyp - which is good,
but manually entered for a normal non-sync'ing phone.
https://backupassistant.myvzweb.com/index.php

With some other carriers,
their Contact Backup might also have an "export" and "import"
so PC files can be used to save or load your contacts.....

But not on VZ - their backup application is just that - a phone backup -

So - wonder which carriers have the "import" and "export"
of contacts to a PC ?

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"If everything seems to be going well,
you have obviously overlooked something." - Steven Wright