The iPhone (left) displays more information in its calendar than the BlackBerry (right), so you get a finer-grained view of your day. Both devices let you get more detailed information by clicking an event. The iPhone doesn't let you change which calendar (such as home or work) that entries are assigned to once you create them. And the BlackBerry doesn't respect multiple Exchange calendars; they're all merged into one. New to iPhone OS 3.0 is the ability to issue invitations from the iPhone, matching a previous BlackBerry advantage.

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