You can manually recovery data from iPhone device with backup image. For that, press adn hold Control button, click iPhone icon that is located in the left side of iTunes interface, or or right click to access submenu and select “Recover from backup copy”. Important clarification: due to backup limits video clips larger than 2 Gb have to be saved separately.
Backups are kept in iTunes folder, path to which depends on type of installed OS. Features of iTunes restrict backups to one per each device, that is why make sure that it is kept safely.
iTunes folder path in different OS will be the following:
for Windows XP: Documents and Settings => (User name) => Application Data => Apple Computer => MobileSync => Backup
for Mac OS: Libraries => Application Support => MobileSync => Backup
for Windows Vista: Users => (User name) => AppData => Roaming => Apple Computer=> MobileSync => Backup
If no backup has been made and lost data is crucial and you can afford data recovery, then you may ask for professional help to recover your data. If for some reason it is not possible to accomplish, it is recommended to use iPhone Spy Stick – an external USB flash-like drive with a pre-installed special software. Product scope ensures recovery of any lost information on your iPhone, i.e. from calls history and phone-book to photos.
To perform data recovery you simply need to simultaneously connect to OS Windows-installed computer an iPhone to be recovered and USB device iPhone Spy Stick, then launch data recovery program from the drive. Having done that the program will start reading data from your device. After that you need to select data you need and recover them. It should be noted that iPhone Spy Stick is not a cheap device, its price is several hundred dollars.