http://www.recovery-iphone.com/data-recovery-for-itunes.html
http://www.recovery-iphone.com/iphone-sms-and-contact-recovery-software-how-to-recover-iphone-sms-contact.html
Step by step to recover SMS and Contact from iPhone with iPhone SMS/Contact recovery software. Read this guide and follow the steps to extract contacts from iTunes backup file in 5 minutes.