I'm a previous android user so I have a couple of questions about how to setup my Gmail, google Contact, and Google calendar. 1) If I use the Gmail app, should I turn off syncing in the google Exchange account? I don't want to sync two copies of the emails to my phone. 2) Is there a way to sync contacts and/or calendar to both gmail and icloud? Or do I pick one or the other? 3) Is there anything else I should know about the best way to set these things up?