Xilisoft iPhone Contacts Backup is a backup utility for your iPhone. It was designed to let you backup all the contacts on your iPhone and save them on your computer for safe-keeping. It can also do the opposite: restore a backup file and put the contacts back on your iPhone.
The graphical user interface consists of four panes and a toolbar at the bottom. The top-left pane shows the connected devices, and under each device a button that reads "Contacts" and the number of contacts between parentheses. On the pane below that, you can find the contacts that are stored on your computer. When you have a device selected, all the contacts will be listed in the center pane, and more information about each contact will be displayed on the right pane. From the toolbar at the bottom, you can backup all your contacts at once, copy selected contacts to your computer or to your device, and delete contacts.
In my testing, I was unable to get the app to display a single contact on my iPhone. I am running version 5.0.1 of iOS, unmodified. The phone was plugged in and unlocked.