clipped from: www.apple.com If iPhone is not working as expected, it may be due to some of the content synced to it. Try selectively removing certain content that may be causing unexpected behavior such as contacts, calendars, songs, photos, videos, or podcasts.
To remove content, connect iPhone via USB and use iTunes to change the sync settings. Click on iPhone in the Source list, and select each tab to change what content is synced then click apply.
