when restoring backup from pc to iphone, what information would be restored (and what wouldnt)?

Hello yyichan,

Thank you for the question. The following information is included in an iTunes backup:

What does iTunes back up

iTunes will back up the following information

• Camera Roll (photos, screenshots, images saved, and videos taken)
  For devices without a camera, Camera Roll is called Saved Photos.
• Contacts* and Contact Favorites (regularly sync your contacts to a computer or cloud service, such as iCloud, to back them up)
• Calendar accounts and subscribed calendars
• Calendar events
• Safari bookmarks, cookies, history, offline data, and currently open pages
• Autofill for webpages
• Offline web application cache/database
• Notes
• Mail accounts (mail messages aren't backed up)
• Microsoft Exchange account configurations
• Call history
• Messages (iMessage and carrier SMS or MMS pictures and videos)
• Voicemail token (This isn't the voicemail password, but is used for validation when connecting. This is only restored to a phone with the same phone number on the SIM card)
• Voice memos
• Network settings (saved Wi-Fi hotspots, VPN settings, network preferences)
• Keychain (includes email account passwords, Wi-Fi passwords, and passwords you enter into websites and some applications)
  If you encrypt the backup, you can transfer the keychain information to the new device. With an unencrypted backup, you can restore the keychain only to the same iOS device. If you're restoring to a new device with an unencrypted backup, you need to enter these passwords again.
• App Store Application data (except the Application itself, its tmp, and Caches folder)
• Application settings, preferences, and data, including documents
• In-app purchases
• Game Center account
• Wallpapers
• Location service preferences for apps and websites you've allowed to use your location
• Home screen arrangement
• Installed profiles
  When you restore a backup to a different device, installed configuration profiles aren't restored (such as accounts, restrictions, or anything that can be specified through an installed profile). Any accounts or settings that aren't associated with an installed profile will be restored.
• Map bookmarks, recent searches, and the current location displayed in Maps
• Nike + iPod saved workouts and settings
• Paired Bluetooth devices (which you can only use if restored to the same phone that did the backup)
• Saved suggestion corrections
• Trusted hosts that have certificates that can't be verified
• Web clips

* Your contacts are part of the backup to preserve recent calls and favorites lists. Back up your contacts to a supported personal information manager (PIM), iCloud, or another cloud-based service to avoid any potential contact data loss.

Find more information at the following link:

iTunes: About iOS backups

http://support.apple.com/kb/ht4946

Thank you for using Apple Support Communities.

Best,

Sheila M.