How might I best sync my EXISTING LinkedIn contacts TO my iPhone or my Gmail with autoupdates so I can call or email them outside of LI?

How might I best sync my EXISTING LinkedIn contacts TO my iPhone or my Gmail with autoupdates so I can call or email them outside of LI?

Lol

I don't have phone or gmail contacts to ADD to LinkedIn.

Looking to keep my address book as updated as LinkedIN as people change jobs all the time.