Lost Contacts after iPhone Jailbreak

http://www.wondershare.com/disk-utility/iphone-jailbreak-lose-contacts.html
http://www.wondershare.com/data-recovery-mac/mac-iphone-data-recovery.html
Will I lose my contacts if I jailbreak my iphone 4? It doesn't matter if you really lost your contacts. This guide tells you how to get it back in 3 steps