Data exchange from old to new iphone
All you need is the location of the iPhone backup and it's easy to restore your new iPhone from the backup. Here are the locations for different operating systems:

Mac: (user)/library/Application Support/MobileSync/Backup/
Windows Vista/7: \Users\(user name)\AppData\Roaming\Apple Computer\MobileSync\Backup\
Windows XP: \Documents and Settings\(user name)\Application Data\Apple Computer\MobileSync\Backup\