Samsung and Google are teaming up to escalate their war on the iPhone with the Galaxy S20 (GOOG, GOOGL, AAPL)

· Samsung's new Galaxy S20 comes with Google's video-chat app, Duo, baked directly into the phone's calling app.
· It's a subtle addition, but one that gives both Samsung and Google important advantages in competing against the iPhone.
· For Samsung, it gives its latest flagship phones a viable alternative to Apple's...