Phone calls!? Who'd want to do that with a smartPHONE?
(Thus, the reason I just dropped AT&T and moved to the VZ iPhone, since AT&T can't seem to pull their heads out of their ... ahem ... here in Colorado.)
I'd say you'll probably have a pretty good experience doing any of the above on just about any smartphone these days. Android or Apple iOS based... wouldn't really matter on things that popular.
Yahoo Mail and Google Mail on the iPhone also both integrate to Yahoo Calendar, and Google Calendar if you want those synced into the phone. The phone does a pretty nice job of displaying all your calendars in one place, or letting you view just one of them.
You can also sync "Notes", which is an Apple thing, mostly. The Notes App on the iDevices then will have the same notes on all of 'em, and Mail.App on a Desktop Mac would also... via Yahoo or Google.
I currently have these things all syncing into the iDevices:
- MobileMe - Mail, Contacts, Calendars (multiple... shared with my wife), Bookmarks, and Notes.
- Gmail - Mail (turned off the Calendar, I'm not using it right now.)
- Yahoo - Mail, Calendar (airplane calendar - co-owners can also see it, but we've been bad about using it... with only three of us, a quick "any conflicts?" e-mail is easier right now)
- Exchange (Corporate Account) Mail, Contacts, Calendars
It does a good job of separating or merging the views for all of the above. "All Inboxes" works great just to see if anything new has come in anywhere. Calendars set to "All Calendars" is a great way to see who's booked what (since my wife's calendar is also in there) and make sure we're not double-booking something.
I can't really speak for how Android handles all of this junk, just sharing what this gadget does. Have had a number of Crackberries in the past, and they worked well for their time, and connected to a BES server they really shined.
iPhone ain't perfect... neither is Android... but with over 100 Apps installed on the iPhone, it'd be a huge pain to move platforms. Haven't seen anything compelling enough to move me over to something else yet, but eventually -- it'll happen.
That or the iPhone 5, 6 and 7 will come out with something interesting. You never know.