I just looked at the Health app on my phone and see that the phone and Band synced 12 minutes ago. I've had the Band 2 for 5 days, and it appears to auto-sync the same way that the first Band did. I have also noticed a few times where the phone shows it has updated with my account more recently than the Band, but I've never paid much attention to when the last sync occurred. If I'm looking for specific information from the Band that hasn't updated yet, I just go ahead and manually trigger a sync.