You can sync your iPhone and your computer so that both have your latest contact, calendar, Microsoft Outlook notes, Internet bookmarks, and email account information. For example, if you add contacts on your iPhone, you can sync to add those contacts to your Windows address book or Outlook Express on your computer.
You can sync iPhone with only one iTunes library at a time. When you sync, iTunes determines which device (iPhone or the computer) contains the most recent information, and lets you choose the information you want to sync.
To sync information with iPhone:
Connect your iPhone to your computer.
When your iPhone appears in the iTunes window, select it.
Click the Info tab and then select the items you want to sync.
If you don’t want your iPhone and your computer to sync when you connect your iPhone to your computer, deselect â€œAutomatically sync when this iPhone is connectedâ€ in the Summary pane.
You can sync your iPhone and your computer any time by choosing File > SyncÂ iPhone.
You can also sync information with your iPhone using MobileMe or Microsoft Exchange. Any items you choose to sync with these applications can also be synced with iTunes. See the documentation for MobileMe and Microsoft Exchange for further details.
If you have problems syncing, try syncing only certain information. For example, deselect the Sync checkboxes on the Music, Photos, Podcasts, and Video panes, and try syncing only Info.
For more information, see the iPhone user’s guide or the Apple support website.