Hi, I just got a free 60 days mobile me try out. I choose to sync my calendars, emails and contacts. Add the mobile me account mail in the iphone. But I left the push notifications off, since it reduce my battery life considerably. But, the sync function still works. How? I mean, how does the iphone get to know that I updated my imac calendar ? I'm afraid it will eat up my battery ! Thank you very much !